If you have another firewall or a VPN (like NordVPN, AnyConnect, or OpenVPN) active, their drivers might be competing for "exclusive" access to the network stack.
If you are trying to install or update Kaspersky security software and hit , you aren't alone. This specific error typically points to a conflict with the Kaspersky Anti-Virus NDIS Filter driver. It essentially means the installer failed to register the network driver, often because a previous version is "stuck" or the Windows network stack is corrupted. error 27300 error installing driver klim6sysx64 exclusive
| Solution | Effectiveness | Risk | |----------|--------------|------| | | High | Low | | Run Kaspersky’s official removal tool (kavremover.exe) | Very High | Medium (removes all Kaspersky components) | | Use pnputil to remove conflicting driver package | Medium | Low | | Disable other AV temporarily + clean boot | Medium | Medium (temporary exposure) | | Manually delete C:\Windows\System32\drivers\klim6sysx64.sys + registry service key | High | High (if not done carefully) | If you have another firewall or a VPN
ERROR_SHARING_VIOLATION – The requested operation cannot be performed because another process has locked the file with dwShareMode=0 . It essentially means the installer failed to register
Corruption in the Windows Cryptographic Services or the catroot2 catalog database, which prevents Windows from verifying the digital signature of the driver.