(SYStem file) A file extension commonly used for DOS/Windows drivers, such as ANSI.SYS, HIMEM.SYS and KEYBOARD.SYS. See system file. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other ...

If you’re faced with this EXFAT FILE SYSTEM (volmgr.sys ... you can rollback the driver or download and install an earlier version of the drivers and see if the issue at hand is resolved.