Quickest way would probably be to just use system restore.
If you can't access the start menu, you can ctl alt del and use the run feature in the task manager. (file -> run) Start System Restore from a command prompt
My Computer
Computer Manufacturer/Model Number
Insane hobo technologies. ;-)
OS
Windows 7 x64
CPU
Intel i7 2600k
Motherboard
Asrock z68 extreme 4 gen 3
Memory
G.skill Ripjaw 16gigs @ 1866
Graphics Card(s)
Nvidia gtx580 (evga)
Sound Card
Integrated HD audio + hdmi
Monitor(s) Displays
24" ASUS widescreen + 42" insignia
Screen Resolution
1080p (1920x1080)
Hard Drives
128 Samsung 830
256 Samsung 840
3 x 1tb storage drive (various)
1 western digital 1tb (eSATA)
1 Seagate 1tb (eSATA)