One issue that quite a few helpdesks and system administrators have to deal with is unlocking
files that are accessed and changed by several users. A neat tool, from Sysinternals (what a surprise…)
can be used to track down the "offending user". The tool is called handle.exe.
Once downloaded it will tell you who locks a specific file by using the syntax in the screenshot (I opened
a file using word-you get the username and the locking PID).