Kaspersky Error 27300 Klif.sys-x64 Fixed

Under the tab, check Hide all Microsoft services and then click Disable all .

Look for any old security software (e.g., McAfee, Norton, Avast, or Malwarebytes). Uninstall them completely.

If the error is related to digital signatures (often accompanied by code 0x8000ffff), you may need to reset the Windows Update catalog: kaspersky error 27300 klif.sys-x64

Check its status. If it is not running, right-click it and select .

Sometimes, a simple reboot can resolve the issue. Restart your computer and check if the error persists. Under the tab, check Hide all Microsoft services

Navigate to > Advanced options > Startup Settings . Click Restart .

Cached installation files from failed setup attempts can cause conflicts during a reinstall. Press the to open the Run dialog box. Type %temp% and press Enter. If the error is related to digital signatures

How to Fix Kaspersky Error 27300 klif.sys-x64 (2026 Updated)

If system files are corrupted, the driver cannot load into the kernel.

Issues with the Base Filtering Engine (BFE) or Network Security Services in Windows.