Corruption in the Windows Cryptographic Services or the catroot2 catalog database, which prevents Windows from verifying the digital signature of the driver.
Ensure you're downloading the latest version of Kaspersky from the official website. Sometimes, older versions or corrupted downloads can cause installation issues. error 27300 error installing driver klim6sysx64 exclusive
Your computer is trying to install a new version of a Kaspersky driver, but an old version (or a remnant of it) is currently running in the background and refusing to let go. Corruption in the Windows Cryptographic Services or the
: If residues remain, you can manually delete the service entry. Open Command Prompt as an Administrator. Type sc delete klim6 and press Enter . Restart your computer. Your computer is trying to install a new
Corrupted system files are a leading cause of driver installation failures. System File Checker sfc /scannow in an elevated Command Prompt.
: Applications that use NDIS filters, such as VMware Workstation, Cisco AnyConnect, or WinPcap, can interfere with the driver installation.
If successful, reboot and try the Kaspersky installation again. Kaspersky Support Forum 4. Run System File Checker (SFC)