Hello, For over a month our HP Compac Presario CQ57 displayed that our Windows 7 might not be genuine. Hence, the computer keeps crashing. This morning the computer crashed and would not come back on again. The computer is stuck on Welcome. I finally got back into the computer and put a product key number, which I took from my other new computer, and it stated that the PN was accepted. However, we are still having the same problem. It will not start in Safe Mode, it will not work if we do a repair, because it asks for a cd, which we did not get with our computer. What can we do get our computer to go past the welcome screen?