Leftover files from previous antivirus installations (like Norton or McAfee) preventing the new driver from registering.
If the error persists, move to the professional fixes below. kaspersky error 27300 klif.sys-x64
Windows preventing the installer from writing to the C:\Windows\System32\drivers directory. select the previously installed Kaspersky product
Run the tool, select the previously installed Kaspersky product, and click . Restart your PC before attempting a fresh installation. 2. Clean Up Conflicting Network Drivers kaspersky error 27300 klif.sys-x64