My Documents, My Computer, and so are not open, and really do not understand how matter

Users questions:Yesterday, when I operate a computer, a box appears, asking me what they allowed to, I probably pressed the permit, and the results of my document, my computer, IE browser, Recycle Bin not open up anything, Other software can be open, it should be with the system on it, I checked the problem seems to occurSource is servicecontrolmanager, do not know anything, anyway, I do not know. I tried several times, will not work, shutdown, restart no use, but today a start, it's all good, how is this going? If the next encounter this problem, how can I operate it?
Experts answer: "UniversalDiskManager" the service description is: "Monitoring and surveillance of new generic disk drive to the Logical Disk Manager to send volumes of information management services to configure. If this service is terminated, dynamic disk status and configuration information will be out of date. IfThis service is disabled, any services depend on it will not start. "You might accidentally deleted the diskman.exe
  • This information provided by the users.Thanks!