scan disk cleanup
CheckDisk, Error Checking, Defrag, MSConfig, Disk Cleanup, Built-in PC Maintenance Tools. Windows comes with some built-in utilities which are essential for maintaining top PC performance. They are CheckDisk or Disk Checking (ChkDsk) in WinXP, Vista and Win7, and Defrag (in all versions of Windows). CheckDisk and ScanDisk can scan your hard drive and repair all kinds of errors, including ones you don't even know you have.