HOLY CRAP!!!!!!!!!!!! Microshaft tech support told you to uninstall windows????? DO NOT DO THAT!!!!!! You will more than likely loose all your stuff.
Do this:
1) open "my computer"
2) RIGHT click the C: drive.
3) Select "Properties"
4) left click the "Tools" tab at the top of that box.
5) Left click on the "Error Checking" button
6) put checks in the 2 boxes that are in the window that pops up.
7) click the "start" button
A dialog box should pop up stating that the entire disk cannot be freed to run the scan, and it will ask you is you want to run it the next time you boot. Click yes, then reboot the machine. When it restarts, it'll run scandisk again, but it will take a bit longer since you told it to do a surface scan and attempt to recover bad sectors.
When it's done, it will generate a report on what it found. Bad sectors, etc. If everything is ok, that's good. Sometimes windows gets stuck on running scandisk after an improper shutdown and running it in this mode should clear it up. If it doesn't, or the disk has developed a problem (bad sectors, mechanical problems, etc) you might have to replace it.
If all else fails, take the thing to a decent computer shop and get a new disk, and tell them you want the new disk installed, and the old disk imaged to the new one. If they look at you blankly, or don't know what imaging, ghosting, or disk cloning is, leave immediately. PM me if you need any other advice or help.
Whitt....