Follow these troubleshooting methods in order to resolve the driver installation failure. 1. Completely Remove Previous Kaspersky Installations

This article provides a comprehensive guide to understanding and resolving this issue, designed for users facing this roadblock on Windows 10/11. What Causes the Kaspersky Error 27300?

Navigate to C:\Windows\System32\ and rename the catroot2 folder to catroot2.old . Restart Cryptographic Services: net start cryptsvc . Try to install Kaspersky again. Final Steps: Contact Support