You can just boot from WinPE CD or USB stick and run Disk Management snap-in. If you do not need to install hundred OSs this should fully satisfy...
By the way, was it a message box or notification and cold restart didn't helped you?
If you just want to know if someone else besides you has access to your documents, simply open Security tab at file/folder Properties dialog box...
What is your educational background? If you are interested in network security, I suggest you to start educating in descrete mathematics in parallel.
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