please see following website, it maybe give you some hints.
http://windowshelp.microsoft.com/Win...31033.mspx#ECE
"Andrew M" wrote:
> Hello,
>
> For some reason when I go to delete some files it won't allow me to even
> thought my account is the only account on the computer and is set up as the
> admin account. It says I need "permission" to preform this action. Who do I
> need permission from Microsoft? Or maybe the creator of the file doesn't like
> the idea of me deleting the file off my computer... this has gone on for far
> to long and I really need help with solving this problem, because now a game
> that worked before wont work at all now and I cannot do anything about it...
> since the deleting the programs folder gives the same problem.
>
> Any help will be appericated