Residual files or registry keys from previous Kaspersky installations can block the current installer from gaining "exclusive" access to the driver path. Kaspersky Support Forum Recommended Fixes
If you are encountering this error, follow these verified steps: Connect a Physical Keyboard error 27300 error installing driver klim6sysx64 exclusive
Corrupted installation logs or temporary files can trigger 2700-series errors. Press Win + R , type %temp% , and hit Enter. Residual files or registry keys from previous Kaspersky
Elias realized the irony immediately. He couldn't install the cooling driver because the cooler was working too hard. error 27300 error installing driver klim6sysx64 exclusive