I am running a 40GB SSD as a Windows 7 boot drive and now am running out of disk space. I have Office installed along with the Firefox browser installed also on "C:\". What are some common files that I can delete, or get rid of to reclaim some more space. When I first installed the OS and program files a year of two ago I had 12GB free. Now I am down to just a little more than 5GB of unused space. Any help appreciated.