New
#11
To the OP. First, Sorry for all the warm and friendly Welcome to Ten Forums you received for your first post. As I understand your post When Win 10 went RTM you upgraded from Windows 7 to Windows 10 and had nothing but problems. You then took it to 3 different people who were supposed to know what they were doing and they could only fix you problem by down grading back to Windows 7. Then your computer for what ever reason upgraded back to Windows 10. I'm not sure your saying your computer will boot and you only get a dark screen or or computer won't even turn on. If it's a dark screen I would try Edwin's suggestion and try a clean install with a Win10 ISO. There are How to guides on this forum. If the computer will not even start I would follow jimbo45's suggestion.