Who are "they" and what exactly have the done? Or, to say it different: what exactly is blocking you to do it?
Hi I have had a HP COMPAQE 8000 elite ultra slim desktop for a while now it emotionally had Windows 7 but was down graded to vista business and was used writhing a business. I have tried installing Windows 7 back on to it but they have done something to it to prevent it I am administrator but can't restor to factory or reinstall Windows. Any advise other than giving up have already bought second hand hard drive and extra ram so would like to keep using it thanks