Hi Guys, i was in a process of removing virus on a customer's computer. I ran MBAM and superantispyware to remove lots of trojans and spywares and then i ran a boot scan from avast and it removed lots of infected system files like msconfig, cmd.exe, notepad, taskmgr.exe, etc. Now the scan is complete and there's no virus left on the computer. But now when i type cmd.exe in RUN, i get an error saying that Windows cannot find RUN & so on.
Is there a way to get those missing system files?
Is there a way to get those missing system files?

My Computer
System One
-
- Manufacturer/Model
- Compaq
- CPU
- intel core 2 duo T 5550 @ 1.83 MHz
- Motherboard
- intel 965 chipset family
- Memory
- 2 GB DDR 2 SD RAM @ 667 MHz
- Graphics card(s)
- On board upto 358 MB RAM
- Sound Card
- Onboard
- Monitor(s) Displays
- 15"
- Hard Drives
- 160 GB WDC