I can't access the C:\ drive I can't install, change any user accounts, delete any files ACCESS HAS BEEN DENIED

This is an Exchange Server forum. I didn't see Exchange in your issue, can you verify that this is not an OS problem? Tim Harrington | MVP: Exchange | MCITP: EMA 2007/2010, MCITP: Server 2008, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington

Hi Your problem is not related to exchange. It is OS question. I can’t explain it in this forum. The user which you login pc hasn’t administrator permission. You can ask your question to http://social.technet.microsoft.com/Forums/en/category/w7itpro,windowsvistaitpro,windowsxpitpro,windowsintune My colleague will teach you to solve it step by step.

Do you have anything to update your issue ?