Kaspersky Error Installing Driver Klim6sys X64 Upd Jun 2026

Windows 10/11 blocks drivers that are not digitally signed. While Kaspersky drivers are signed, a corrupted signature cache can cause false rejection.

Real-time protection from Windows Security can interfere with driver installation. kaspersky error installing driver klim6sys x64 upd

The error occurs when the installer cannot write the new driver to the C:\Windows\System32\drivers\ folder or properly register it with the Windows kernel. When this happens, Windows prevents the driver from loading, and Kaspersky aborts the installation. Windows 10/11 blocks drivers that are not digitally signed

Sometimes the "UpperFilters" or "LowerFilters" in the Windows Registry still point to the klim6 driver, causing the installer to think it’s already active. Press Win + R , type regedit , and hit Enter. Windows prevents the driver from loading

Modern Windows versions (20H2 and newer) have security features that can block unsigned or older drivers.