Error 27300 typically occurs when installing Kaspersky software on Windows, specifically failing to install the (Kaspersky Labs Interceptor and Mutualizer) network driver
Error 27300 is a native Windows Installer (MSI) error that typically indicates a kernel-mode driver installation failure. When paired with the string "exclusive" and the driver name klim6sysx64, this report confirms a critical conflict: the Windows operating system cannot overwrite, replace, or register the driver because a running process, security service, or the driver itself has an exclusive lock on the target system file or registry path. error 27300 error installing driver klim6sysx64 exclusive
If another process holds an exclusive handle to the file path or the service key, the transaction fails and rolls back, triggering Error 27300. Delete the Driver: If another process holds an
The most common cause is a leftover file from a previous installation. Standard Windows uninstallation often leaves registry keys or driver files behind. Download the official kavremover utility from Kaspersky. Boot your computer into Safe Mode. the transaction fails and rolls back