Operation cancelled error

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About a month ago, I had left my house to go away with family. My computer
was fine at the time, no viruses or spyware (a hint of lag.), and I had done
nothing to it prior. When I come back 3-4 days later, I could not get into
certain programs like Security Center or Add or Remove Programs because the
same message says " This operation has been cancelled due to
restrictions in effect on this computer. Please contact your system
administer." I have tried everything I could to solve this, but nothing works
(Note: I did absolutely nothing on administration like passwords and the
such). Is there a way to fix this issue?
.

Relevant Pages

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