If the error is related to digital signatures (often accompanied by code 0x8000ffff), you may need to reset the Windows Update catalog:
Download the kavremover tool from the official Kaspersky website.
Traces of previous Kaspersky installations or other third-party security software can conflict with new drivers. kaspersky error 27300 klif.sys-x64
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 If the error is related to digital signatures
Before attempting a fresh install, ensure all traces of previous versions are gone.
Several factors can trigger this driver installation failure: kaspersky error 27300 klif.sys-x64
Network drivers from applications like VMware , Cisco AnyConnect, or WinPcap often conflict with Kaspersky’s NDIS filter.