Error 27300
Context: Driver Installation Failure
Affected Driver: klim6sysx64.sys
Issue Type: Exclusive Access / Permissions Conflict
Sometimes, simply restarting your computer and then attempting to install the driver again can resolve the issue. error 27300 error installing driver klim6sysx64 exclusive
If the error persists, Windows Security is likely blocking you. 1. Restart Your Computer Sometimes
Step 1: Open Windows Security (search for it in the Start menu). Step 2: Click on Virus & threat protection. Step 3: Under "Virus & threat protection settings," click Manage settings. Step 4: Turn off Tamper Protection. Step 5: Also turn off Real-time protection temporarily. Step 6: Try the installation again. Important: Re-enable Tamper Protection after the driver installs successfully. error 27300 error installing driver klim6sysx64 exclusive
| Solution | Effectiveness | Risk |
|----------|--------------|------|
| Safe Mode boot + manual driver deletion | 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) |