My Computer in Danger

Well…..My Computer’s Condition is Really Bad now a days and i need some one to help me out…PLZzz….
1> Problem
My Computer Gives an Error Saying there are Corrupt Files in your System
,So what should i do to Fix it
2> Problem
My Computer Starts very Slowly
GUYS,Help
Answer #1
Okay mate, first of all do a complete system scan. Use NOD32/Kaspersky to detect viruses and Trojans, use Ad-Aware for spyware and adware. Then scan with Registry Mechanic for broken registry keys. After you’re done (I’m assuming you’re using Windows since you haven’t specified otherwise) insert your Windows disk into the PC and in Start–>Run (the start menu search in Vista) type in “sfc /scannow” without the quotes. This will scan your system files and replace broken or corrupt ones. I hope this solves your problem. If it doesn’t why not try a clean reinstall of your OS?! Back everything you need up and format your HDD completely and install a fresh copy of your OS. Good luck mate ^_^