Essentially, on my laptop I bought around a year ago it came with Microsoft Office pre-installed. However, over time the computer started to well start stocking up on useless things, getting virus's because I didn't really care for it as I had my desktop, so I decided to system restore to factory defaults. However, my problem arises now as Microsoft Office is still installed on the computer as it was added at the factory so it is a part of factory defaults, however when I open the installer it prompts me to enter my CD-Key. I am pretty sure the CD key is the one on the bottom of the PC, and I have typed it in; however it is saying it is invalid. Is there any way to restore my Office, by messaging Microsoft and explaining that I restored my computer and I need to use the same CD key again? Any help or pointers is greatly appreciated, thanks in advance!