Possible virus on computer/computer restarting

It seemed that there is a problem with my computer that is why I was thinking maybe it was infected with a virus? I was trying to fix it myself when suddenly this repair interface error message came out.
Crltical Hard Disk Driver Error:
Windows 7 Repair detected a bad sector on your hard disk drive. This error may cause the following problems:
-Data corruption and loss
– Hand drive inaccessbality
– System errors and failures.
What do I have to do with this?
Is restarting the system an option?
Please help me.
