Error 27300 Error Installing Driver Klim6sysx64 Exclusive -

If all else fails, you might consider manually installing the driver:

Conclusion

Error 27300 typically occurs when installing Kaspersky software on Windows, specifically failing to install the (Kaspersky Labs Interceptor and Mutualizer) network driver

. This driver is essential for filtering network traffic and often conflicts with leftover software or system file corruption. Kaspersky Support Forum Primary Causes Residual Files

: Leftover drivers from previous Kaspersky installations or other antivirus programs like McAfee. System Integrity Issues : Corruption in the Windows Cryptographic Services or the catalog database. Filter Overload

: Too many network filter drivers installed on the network adapter, exceeding system limits. Unsupported Hardware error 27300 error installing driver klim6sysx64 exclusive

: Attempting installation on unsupported ARM processor architectures. Kaspersky Support Forum Step-by-Step Fixes 1. Clean Uninstall and Residual Removal

Before attempting a fresh install, ensure all traces of previous security software are gone. Use the Kavremover Tool : Download and run the official Kaspersky removal tool (kavremover) to purge all hidden files and registry keys. Remove Third-Party Antivirus

: 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

Restart your computer; Windows will automatically recreate a fresh, uncorrupted version of the folder. 3. Manually Delete the Stuck Driver

If a previous version of the driver is locked, you can force its deletion via the command line. Command Prompt as an Administrator. Run the command: sc delete klim6 If all else fails, you might consider manually

If successful, reboot and try the Kaspersky installation again. Kaspersky Support Forum 4. Run System File Checker (SFC)

If the error persists due to OS instability, use built-in Windows tools to repair system files.

Error 27300
Context: Driver Installation Failure
Affected Driver: klim6sysx64.sys
Issue Type: Exclusive Access / Permissions Conflict

Before fixing the error, you must identify the root cause. Here are the most common triggers:

| Component | Description | |-----------|-------------| | Error Code | 27300 (MSI ERROR_INSTALL_FAILURE) | | Internal Subcode | Often maps to ERROR_SHARING_VIOLATION (32) or ERROR_ACCESS_DENIED (5) | | Phase | Commit / Driver registration (InstallExecuteSequence) | | Flag | exclusive – kernel lock on .sys file or device object | Before fixing the error, you must identify the root cause

When an MSI-based installer reaches the InstallFinalize stage, it attempts to:

If another process holds an exclusive handle to the file path or the service key, the transaction fails and rolls back, triggering Error 27300.

Sometimes the driver is not in System32\drivers but is staged in the driver store.

Step 1: Open Command Prompt as Administrator. Step 2: List all third-party drivers: pnputil /enum-drivers Step 3: Find any entry containing klim6 or kaspersky. Note the "Published Name" (e.g., oem42.inf). Step 4: Delete it: pnputil /delete-driver oem42.inf /uninstall /force Step 5: Reboot and retry.

Some software packages come with a built-in troubleshooter for driver installations. Check if such a tool is available for your Klim6sysx64 exclusive driver.