Whether your TeamViewer fails to connect, disconnects frequently, or is suddenly flagged for “commercial use,” this complete guide will help you quickly fix all TeamViewer connection and functionality issues. We’ll walk you through how to check your network, permissions, and system settings, and introduce a reliable alternative so your remote control can return to smooth operation.
Recommended Reads:
Why Is My TeamViewer Not Connecting?
If TeamViewer can’t connect, shows “Unable to connect to partner,” or gets stuck on “Connecting,” or even fails to log in, the issue usually comes from one of several core areas. Common causes include unstable internet, incorrect Windows permissions, firewall or proxy blocking, IPv6 conflicts, licensing errors, or temporary server maintenance.
Don’t want the hassle? Try DeskIn — it offers stable connections and supports commercial use for free!
Common Problems and Fixes:
Problem Source | Corresponding Fix |
Network or VPN blocking | Method 1: Check Internet Connection & VPN Status |
Insufficient permissions | Method 2: Change TeamViewer Access Permissions |
System configuration error | Method 3: Check and Adjust Windows Settings |
Firewall blocking | Method 4: Adjust Firewall & Proxy Settings |
IPv6 conflict | Method 5: Disable IPv6 on Both Devices |
Outdated software version | Method 6: Update or Reinstall TeamViewer |
DNS/TCP errors | Method 7: Refresh DNS & TCP/IP via CMD |
Server issues | Method 8: Check TeamViewer Server Status |
Background program conflict | Method 9: Perform a Clean Boot to Isolate Conflicts |
For more remote connection guides:
9 Ways to Fix TeamViewer Connection Issues
Whether you’re using the free or business edition of TeamViewer on Windows, macOS, iPhone/iPad, or Android, these 9 fixes will help you troubleshoot and restore your connection quickly. These steps are simple, effective, and compatible with all devices to ensure smooth remote access.
For more device-based tutorials, check out:
Method 1: Check Internet Connection and VPN Status
Network instability is the most common reason for TeamViewer connection failures. Unstable Wi-Fi, VPN misconfigurations, or proxies may cause timeouts or connection blocking.
Steps:
Press Win + R, type
cmd, and hit Enter.Type
ping -t 8.8.8.8and observe the response time. If latency spikes or packets drop frequently, your network is unstable.Use Speedtest to check your internet speed or restart your router / switch to a wired connection for better stability.

If your internet is fine but TeamViewer still won’t connect, move on to the next fix.
Method 2: Change TeamViewer Access Permissions
If you can’t connect or can’t control your partner’s screen, your access permissions may be too limited.
Steps:
On the remote computer, open TeamViewer, click the gear icon, and open Options.
Go to Advanced, then click Show advanced options.
Under “Advanced settings for connections to this computer,” set Access Control to Full Access.
This ensures you have full control and can solve most permission-related connection problems.
Method 3: Check and Adjust Windows Settings
If TeamViewer keeps failing to connect, Windows User Account Control (UAC) or Remote Desktop settings may be interfering.
Make sure UAC allows TeamViewer to make system changes.
Verify that Remote Desktop services are running.
Restart your computer after major Windows or TeamViewer updates.
Method 4: Adjust Firewall and Proxy Settings
Windows Firewall or proxy restrictions can block TeamViewer’s necessary ports.
Steps:
Open Windows Defender Firewall → Allow an app through Firewall.
Click Change settings, then ensure TeamViewer Remote Control Service is checked.
Go to Control Panel → Internet Options → Connections → LAN Settings, and uncheck Use a proxy server for your LAN if it’s enabled.
If it’s too complex to reconfigure, consider switching to DeskIn — it connects instantly without firewall hassle.
Method 5: Disable IPv6 on Both Computers
IPv6 incompatibility can sometimes cause connection failures.
Steps:
Press Win + R, type
ncpa.cpl, and hit Enter.Right-click your active network → Properties.
Uncheck Internet Protocol Version 6 (TCP/IPv6) and click OK.
Repeat the same on the remote PC.
Reboot and retry — this often resolves unknown “Cannot connect to partner” errors.
Method 6: Update or Reinstall TeamViewer
Outdated or unofficial versions can lead to compatibility issues.
Steps:
Open TeamViewer → Menu (≡) → Check for new version.
If updating doesn’t help, uninstall TeamViewer from Control Panel → Programs and Features, then reinstall the latest version from the official website.
Pro tip: If you’re on Mac, you can also use Microsoft Remote Desktop or turn your iPad into a second screen for smoother multitasking.
Method 7: Refresh DNS and TCP/IP via CMD
If login or verification fails, network cache may be corrupted.
Steps:
Open CMD as Administrator.
Type the following commands one by one:
ipconfig /release
ipconfig /flushdns
ipconfig /renew
nbtstat –r
netsh int ip reset resetlog.txt
netsh winsock reset

Restart your PC and reconnect TeamViewer.
Method 8: Check TeamViewer Server Status
Sometimes, the issue isn’t on your end.
Steps:
Visit the TeamViewer server status page.
Check if your regional servers are down.
If there’s downtime, wait or use DeskIn as a stable alternative.
Method 9: Perform a Clean Boot to Eliminate Background Conflicts
Antivirus or startup apps may interfere with TeamViewer.
Steps:
Press Win + R, type
msconfig, and hit Enter.Under General, select Selective startup and uncheck “Load startup items.”
In Services, check “Hide all Microsoft services” and click Disable all.
Restart your PC.
Temporarily disable antivirus software and try connecting again.
This isolates background conflicts that cause TeamViewer connection drops.
Recommended Alternative: DeskIn Remote Control
If you’re tired of TeamViewer’s connection limits or false commercial-use flags, DeskIn is a reliable alternative. It offers industry-leading 4K 60FPS quality, ultra-low latency, and free commercial usage.With 200+ global nodes and smart routing, DeskIn ensures stable remote sessions, even for high-load tasks.
Pricing highlights:
Standard plan: $4.16/month (annual billing)
Performance plan: $16.66/month with multi-monitor and fast file transfer
Free version: includes Wake-on-LAN, screen mirroring, voice chat, and whiteboard collaboration

Why Choose DeskIn Over TeamViewer?
Superior connection stability — long sessions without disconnects, even on free plans. You can connect two computers easily with DeskIn
High-quality visuals & low latency — up to 4K60FPS or 2K144FPS with 4:4:4 color accuracy.
Comprehensive multi-monitor & interaction features — screen extension, projection, virtual screens, voice chat, whiteboard.
Remote Wake (Wake-on-LAN) — power on your PC remotely.
Unlimited file transfers — up to 12MB/s without size limits.
Cross-platform support — Windows, macOS, Android, iOS.
Affordable pricing — starting at $4.16/month vs. TeamViewer’s $50.9/month.
DeskIn combines high performance, flexibility, and cost efficiency — ideal for individuals and teams alike.
3 Simple Steps to Use DeskIn
Install DeskIn on both computers and log in with the same account.


Select your target device from the list and click “Remote Control.”

Control remotely — transfer files, share screen, or communicate instantly.

Fixing “Commercial Use Detected” on TeamViewer
Even personal users are sometimes flagged for commercial use due to TeamViewer’s detection algorithms. This disrupts workflow and limits functionality. You can appeal to unlock your account or switch to DeskIn, which allows free commercial usage without restrictions.
Why Does TeamViewer Flag for Commercial Use?
TeamViewer monitors your IP, domain, connection frequency, and activity. Using corporate domains or connecting to multiple devices may trigger a “commercial use suspected” warning.
How to Submit an Appeal
Visit the TeamViewer Commercial Use Suspected page.

Fill out your name, email, affected TeamViewer ID, and explain your personal use case.
Upload your log files
Wait about 7 days for review.
After approval, your account will return to the free version.
Temporary Workaround: Use DeskIn
If you’re locked out of TeamViewer, DeskIn offers free, unrestricted remote control for both personal and business use. It’s fast, stable, and won’t get blocked for “commercial activity.”

FAQ
Q: Why does TeamViewer disconnect after 5 minutes?
A: The free version has a session time limit or may be flagged as commercial. DeskIn has no time limit and offers stable connections.
Q: What are the limitations of TeamViewer Free?
A: Free users face time limits, feature restrictions, and commercial detection. DeskIn Free removes all these barriers and allows business use.
Q: Can I control my PC from a phone with TeamViewer?
A: TeamViewer mobile is limited and may fail to connect. DeskIn supports iOS/Android remote control with full features like screen extension and voice chat.
Conclusion
This guide outlined 9 fixes for TeamViewer connection failures — from checking your network and permissions to disabling IPv6, reinstalling the app, and resetting DNS/TCP settings. We also covered how to resolve or appeal a commercial-use restriction.
To avoid these issues entirely, try DeskIn — a stable, high-performance, and free-for-commercial-use alternative with 4K streaming, multi-screen support, and no session limits. It’s the smarter way to remote work securely and efficiently.

Whether your TeamViewer fails to connect, disconnects frequently, or is suddenly flagged for “commercial use,” this complete guide will help you quickly fix all TeamViewer connection and functionality issues. We’ll walk you through how to check your network, permissions, and system settings, and introduce a reliable alternative so your remote control can return to smooth operation.
Recommended Reads:
Why Is My TeamViewer Not Connecting?
If TeamViewer can’t connect, shows “Unable to connect to partner,” or gets stuck on “Connecting,” or even fails to log in, the issue usually comes from one of several core areas. Common causes include unstable internet, incorrect Windows permissions, firewall or proxy blocking, IPv6 conflicts, licensing errors, or temporary server maintenance.
Don’t want the hassle? Try DeskIn — it offers stable connections and supports commercial use for free!
Common Problems and Fixes:
Problem Source | Corresponding Fix |
Network or VPN blocking | Method 1: Check Internet Connection & VPN Status |
Insufficient permissions | Method 2: Change TeamViewer Access Permissions |
System configuration error | Method 3: Check and Adjust Windows Settings |
Firewall blocking | Method 4: Adjust Firewall & Proxy Settings |
IPv6 conflict | Method 5: Disable IPv6 on Both Devices |
Outdated software version | Method 6: Update or Reinstall TeamViewer |
DNS/TCP errors | Method 7: Refresh DNS & TCP/IP via CMD |
Server issues | Method 8: Check TeamViewer Server Status |
Background program conflict | Method 9: Perform a Clean Boot to Isolate Conflicts |
For more remote connection guides:
9 Ways to Fix TeamViewer Connection Issues
Whether you’re using the free or business edition of TeamViewer on Windows, macOS, iPhone/iPad, or Android, these 9 fixes will help you troubleshoot and restore your connection quickly. These steps are simple, effective, and compatible with all devices to ensure smooth remote access.
For more device-based tutorials, check out:
Method 1: Check Internet Connection and VPN Status
Network instability is the most common reason for TeamViewer connection failures. Unstable Wi-Fi, VPN misconfigurations, or proxies may cause timeouts or connection blocking.
Steps:
Press Win + R, type
cmd, and hit Enter.Type
ping -t 8.8.8.8and observe the response time. If latency spikes or packets drop frequently, your network is unstable.Use Speedtest to check your internet speed or restart your router / switch to a wired connection for better stability.

If your internet is fine but TeamViewer still won’t connect, move on to the next fix.
Method 2: Change TeamViewer Access Permissions
If you can’t connect or can’t control your partner’s screen, your access permissions may be too limited.
Steps:
On the remote computer, open TeamViewer, click the gear icon, and open Options.
Go to Advanced, then click Show advanced options.
Under “Advanced settings for connections to this computer,” set Access Control to Full Access.
This ensures you have full control and can solve most permission-related connection problems.
Method 3: Check and Adjust Windows Settings
If TeamViewer keeps failing to connect, Windows User Account Control (UAC) or Remote Desktop settings may be interfering.
Make sure UAC allows TeamViewer to make system changes.
Verify that Remote Desktop services are running.
Restart your computer after major Windows or TeamViewer updates.
Method 4: Adjust Firewall and Proxy Settings
Windows Firewall or proxy restrictions can block TeamViewer’s necessary ports.
Steps:
Open Windows Defender Firewall → Allow an app through Firewall.
Click Change settings, then ensure TeamViewer Remote Control Service is checked.
Go to Control Panel → Internet Options → Connections → LAN Settings, and uncheck Use a proxy server for your LAN if it’s enabled.
If it’s too complex to reconfigure, consider switching to DeskIn — it connects instantly without firewall hassle.
Method 5: Disable IPv6 on Both Computers
IPv6 incompatibility can sometimes cause connection failures.
Steps:
Press Win + R, type
ncpa.cpl, and hit Enter.Right-click your active network → Properties.
Uncheck Internet Protocol Version 6 (TCP/IPv6) and click OK.
Repeat the same on the remote PC.
Reboot and retry — this often resolves unknown “Cannot connect to partner” errors.
Method 6: Update or Reinstall TeamViewer
Outdated or unofficial versions can lead to compatibility issues.
Steps:
Open TeamViewer → Menu (≡) → Check for new version.
If updating doesn’t help, uninstall TeamViewer from Control Panel → Programs and Features, then reinstall the latest version from the official website.
Pro tip: If you’re on Mac, you can also use Microsoft Remote Desktop or turn your iPad into a second screen for smoother multitasking.
Method 7: Refresh DNS and TCP/IP via CMD
If login or verification fails, network cache may be corrupted.
Steps:
Open CMD as Administrator.
Type the following commands one by one:
ipconfig /release
ipconfig /flushdns
ipconfig /renew
nbtstat –r
netsh int ip reset resetlog.txt
netsh winsock reset

Restart your PC and reconnect TeamViewer.
Method 8: Check TeamViewer Server Status
Sometimes, the issue isn’t on your end.
Steps:
Visit the TeamViewer server status page.
Check if your regional servers are down.
If there’s downtime, wait or use DeskIn as a stable alternative.
Method 9: Perform a Clean Boot to Eliminate Background Conflicts
Antivirus or startup apps may interfere with TeamViewer.
Steps:
Press Win + R, type
msconfig, and hit Enter.Under General, select Selective startup and uncheck “Load startup items.”
In Services, check “Hide all Microsoft services” and click Disable all.
Restart your PC.
Temporarily disable antivirus software and try connecting again.
This isolates background conflicts that cause TeamViewer connection drops.
Recommended Alternative: DeskIn Remote Control
If you’re tired of TeamViewer’s connection limits or false commercial-use flags, DeskIn is a reliable alternative. It offers industry-leading 4K 60FPS quality, ultra-low latency, and free commercial usage.With 200+ global nodes and smart routing, DeskIn ensures stable remote sessions, even for high-load tasks.
Pricing highlights:
Standard plan: $4.16/month (annual billing)
Performance plan: $16.66/month with multi-monitor and fast file transfer
Free version: includes Wake-on-LAN, screen mirroring, voice chat, and whiteboard collaboration

Why Choose DeskIn Over TeamViewer?
Superior connection stability — long sessions without disconnects, even on free plans. You can connect two computers easily with DeskIn
High-quality visuals & low latency — up to 4K60FPS or 2K144FPS with 4:4:4 color accuracy.
Comprehensive multi-monitor & interaction features — screen extension, projection, virtual screens, voice chat, whiteboard.
Remote Wake (Wake-on-LAN) — power on your PC remotely.
Unlimited file transfers — up to 12MB/s without size limits.
Cross-platform support — Windows, macOS, Android, iOS.
Affordable pricing — starting at $4.16/month vs. TeamViewer’s $50.9/month.
DeskIn combines high performance, flexibility, and cost efficiency — ideal for individuals and teams alike.
3 Simple Steps to Use DeskIn
Install DeskIn on both computers and log in with the same account.


Select your target device from the list and click “Remote Control.”

Control remotely — transfer files, share screen, or communicate instantly.

Fixing “Commercial Use Detected” on TeamViewer
Even personal users are sometimes flagged for commercial use due to TeamViewer’s detection algorithms. This disrupts workflow and limits functionality. You can appeal to unlock your account or switch to DeskIn, which allows free commercial usage without restrictions.
Why Does TeamViewer Flag for Commercial Use?
TeamViewer monitors your IP, domain, connection frequency, and activity. Using corporate domains or connecting to multiple devices may trigger a “commercial use suspected” warning.
How to Submit an Appeal
Visit the TeamViewer Commercial Use Suspected page.

Fill out your name, email, affected TeamViewer ID, and explain your personal use case.
Upload your log files
Wait about 7 days for review.
After approval, your account will return to the free version.
Temporary Workaround: Use DeskIn
If you’re locked out of TeamViewer, DeskIn offers free, unrestricted remote control for both personal and business use. It’s fast, stable, and won’t get blocked for “commercial activity.”

FAQ
Q: Why does TeamViewer disconnect after 5 minutes?
A: The free version has a session time limit or may be flagged as commercial. DeskIn has no time limit and offers stable connections.
Q: What are the limitations of TeamViewer Free?
A: Free users face time limits, feature restrictions, and commercial detection. DeskIn Free removes all these barriers and allows business use.
Q: Can I control my PC from a phone with TeamViewer?
A: TeamViewer mobile is limited and may fail to connect. DeskIn supports iOS/Android remote control with full features like screen extension and voice chat.
Conclusion
This guide outlined 9 fixes for TeamViewer connection failures — from checking your network and permissions to disabling IPv6, reinstalling the app, and resetting DNS/TCP settings. We also covered how to resolve or appeal a commercial-use restriction.
To avoid these issues entirely, try DeskIn — a stable, high-performance, and free-for-commercial-use alternative with 4K streaming, multi-screen support, and no session limits. It’s the smarter way to remote work securely and efficiently.

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🎮 Gaming Plan $8.13/Month 🚀Performance Plan $12.5/Month
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1111 Best Deal 25% OFF
Yearly Plan
Gaming Plan $8.13/Month
Performance Plan $12.5/Month
👉 Use Promo Code [DESKIN25]
& Enjoy Premium Features













