If it will not let you rename it, you may need to . Try the installation again. 3. Run System File Checker (SFC) and DISM
Right-click your active connection (Wi-Fi or Ethernet) and select .
How to Fix Error 27300 Error Installing Driver klim6.sys_x64 Exclusive
Standard Windows uninstallation routines frequently leave driver keys in the registry. A deep purge is required to clear these out.
ERROR_SHARING_VIOLATION – The requested operation cannot be performed because another process has locked the file with dwShareMode=0 . error 27300 error installing driver klim6sysx64 exclusive
This error is a frustrating but common issue, particularly in Windows 10 and 11 environments. It indicates a conflict between the installer's low-level driver ( klim6.sys ) and your current system configuration.
Error 27300 is a – not a standard Windows error code. It typically appears in:
The klim6sysx64 driver was trying to take exclusive control of the port, but the hardware was screaming, 'I'm busy saving us from overheating!'
Run the tool, select the product you were trying to install, and click . If it will not let you rename it, you may need to
Ensure Windows is fully updated. In some cases, the error occurs because required system certificates or security patches are missing.
: Use dedicated removal tools for any previously installed software (e.g., McAfee Consumer Product Removal tool Kaspersky Support Forum 2. Reset the Cryptographic Services Database Corruption in the Windows driver catalog often prevents from being verified and installed. Command Prompt as an Administrator. net stop cryptsvc and press Enter to stop the service. Rename the catalog folder by typing ren %systemroot%\System32\catroot2 catroot2.old
: In some cases, other VPNs or firewall software with their own NDIS filters (like OpenVPN or Cisco AnyConnect) can cause "exclusive" access errors. Try temporarily disabling or uninstalling these before the Kaspersky setup. Technical Summary Error Code (Kaspersky Lab Interceptor and Masker) Primary Target Windows 10 / Windows Server Resolved in latest builds (March 2025) Are you seeing this error on a personal PC remote server
If it is set to 8 or 10, right-click and change the value to 14 (Decimal). Restart your PC. Solution 3: Manually Clean Network Adapters Run System File Checker (SFC) and DISM Right-click
How to Fix Kaspersky Error 27300: Error Installing Driver klim6.sys_x64 Exclusive
Always ensure your Windows Updates are current before installing security software, as Kaspersky relies on specific Windows digital signature verifications that are updated through Microsoft.
The driver installation failed because the system could not verify, load, or start the driver.
The klim6sysx64.sys file is an NDIS Intermediate Miniport Driver associated with Kaspersky Lab. It acts as a bridge between your network adapter and the security software to filter network traffic for malicious threats.
: If you are on an older OS, a registry tweak may be required.
A: No. The klim6 driver is core to Kaspersky’s protection. Without it, the antivirus will run in a degraded state (real-time protection will fail). You must fix the error.