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Troubleshooting

Fix Windows Security Token Expired Error 0x80070520

You see error 0x80070520 with the message 'The security token has expired.' This usually happens ...

Troubleshooting

Fix Windows Defender Threat Service Permission Denied Error

When you open Windows Security and see "Threat service has stopped. Restart it now." or a "Permis...

Troubleshooting

OBS Virtual Camera Black Screen: How to Fix

If you see a black screen when using OBS Studio’s virtual camera in Zoom, Teams, or other apps, t...

Troubleshooting

Fix Microsoft Store Token Expired Error on Windows 11

You open Microsoft Store on Windows 11 and see a message like "Token expired" or "Something went ...

Troubleshooting

Fix Windows Defender Virus Definition Update Errors

When Windows Defender fails to update virus definitions, you might see error codes like 0x8007000...

Troubleshooting

Fix OpenVPN Permission Denied on Tun Device

When running OpenVPN, you might see an error like ERROR: Cannot open TUN/TAP dev /dev/net/t...



        
            
                
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                    Support Note
                     Test fixes in a non-critical profile first, keep backups for configuration files, and record exact error messages before changing settings.