Kaspersky Error - Installing Driver Klim6sys X64 Upd
If none of the above solutions work, these advanced methods are available:
| Cause | Explanation |
|-------|-------------|
| Pending reboot | Previous Kaspersky uninstall/update left registry locks. |
| Driver conflict | Another security product (even remnants of Avast, McAfee, Norton) blocks Kaspersky’s driver. |
| Windows Driver Signature Enforcement | Kaspersky’s driver may fail if signature enforcement is off or tampered. |
| Corrupted driver cache | Old klim6.sys remains in C:\Windows\System32\drivers\ or C:\ProgramData\Kaspersky Lab\. |
| Permissions / Group Policy | Lack of admin rights or software restriction policies block driver installation. |
| Disk corruption / bad sectors | Rare, but can cause driver write failure. |
| Antimalware Early Launch | Windows blocks the driver from loading at boot. |
| Priority | Fix | Success Rate | |----------|-----|---------------| | 1 | Full shutdown + Run as Admin | 30% | | 2 | kavremover tool in Safe Mode | 60% | | 3 | Disable Memory Integrity | 45% | | 4 | Delete pending rename registry key | 25% | | 5 | DISM + SFC scan | 15% | | 6 | In-place Windows upgrade | 95% (last resort) | kaspersky error installing driver klim6sys x64 upd
Windows 10/11’s “Fast Startup” feature can lock system drivers. A simple restart may not clear this lock.
Steps:
The exact error code is often logged.
Corresponding actions:
Once you have Kaspersky working again, follow these best practices:
Multiple factors can trigger this specific driver installation failure: If none of the above solutions work, these
| Cause Category | Specific Issue |
|----------------|----------------|
| Remnants of old security software | Leftover drivers from Norton, McAfee, Avast, AVG, or even older Kaspersky versions conflict with the new driver. |
| Corrupted driver store | Windows Driver Store has a corrupted entry for klim6.sys. |
| Active conflicts | Another security product is running in real-time and blocking driver installation. |
| Windows File Protection | System File Checker (SFC) may have locked the driver folder due to permission issues. |
| Pending uninstallation jobs | A previous Kaspersky uninstall did not complete, leaving registry keys that block reinstallation. |
| Insufficient privileges | The installer is not running with full administrator rights, or UAC is blocking kernel modifications. |
| Antimalware or group policy | Windows Defender or an enterprise group policy prevents unsigned or third-party drivers from loading. |