Hi my friend has a desktop computer,in which Im trying to help her fix.It had windows 8 on it. The computer was sent to a repair guy,in which was returned to her with windows 7 on it,she didn't ask for this. But also weitrd things are happening and she now cant do much with it. Everytime she trys to open a program a dialogue box comes up.asking if she wants to run the program,but when she clicks yes on it,it just keeps repeateatably coming up.We cant do a system restore or repair,and it doesn't have any backu[p on it.We want to put windows 8 back on it,but it wont let us,thankyou Lucie