If a System Restore does not work, and then reviewing your post, check if your recovery partition exists (F11 on Thinkpads and Lenovo laptops I think) and consider reimaging your machine.
Before reimaging: (1) back off all your data (including hidden data like email) and (2) see if you can run PC Doctor to determine if there are other hardware errrors.
With respect to recovery, you can get CD's from Lenovo if necessary.
... Thinkpads_User