Before attempting a fresh install, ensure all traces of previous versions are gone.

Download the kavremover tool from the official Kaspersky website.

Error 27300 when installing a Kaspersky application for home

Run the utility, select the product you are trying to install/remove, and follow the prompts. immediately after the tool finishes. 2. Clean the Windows Cryptographic Folders

Several factors can trigger this driver installation failure:

Traces of previous Kaspersky installations or other third-party security software can conflict with new drivers.