• Enumerate the machine to check for any kernel exploit
• Remeber to check window version and architecture systeminfo | findstr /B /C:"OS Name" /C:"OS Version" /C:"System Type”
• then exploit it using exploits in https://github.com/SecWiki/windows-kernel-exploits

Or Check drivers

• in cmd, driverquery /v
• searchsploit <suspicious driver> to check exploit for it