My computer is an Acer laptop and it came with windows 7 home prem. when I bought it in october 2009. I have recently been having troubles with it and decided to reformat it. I don't think my computer came with a reformating disk so I used someone else's disk, but the key code on the bottom of my laptop won't work with it. I would like to know what I can do to get it to work. Is there any way to contact or to get my original version back on my computer so the key code will work? If someone could respond to this thread as soon as possible with possible solutions I would appreciate it.