Fix a corrupt system Windows XP O/S

Windows XP has the ability to repair itself from 3rd party software overwriting important system files. To fix this we will use a utility called System File Checker or sfc for short

Parameters
/scannow : Scans all protected system files immediately.
/scanonce : Scans all protected system files once.
/scanboot : Scans all protected system files every time the computer is restarted.
/revert : Returns the scan to its default operation.
/purgecache : Purges the Windows File Protection file cache and scans all protected system files immediately.
/cachesize=x : Sets the size, in MB, of the Windows File Protection file cache.
/? : Displays help at the command prompt.



Things You'll Need
Windows XP Home/Pro system depends on your Operation System (O/S)

Steps
1 Step One
Go to Start then run and then type sfc /scan now. It will Prompt you to insert a cd
2 Step Two
Insert the cd and let the SFC utility run
3 Step Three
Whats going on? the SFC will check your changes to the main system files.