1. Compress your all drive to save disk space.(FAT file system cannot use this method.)
   • Open My Computer > right click on your drive and Properties
   • Check Enable “Compress drive to save disk space”
   • Click Apply
2. Use third party software or Windows compressed zipped folder to Zip any text file that you no longer access.
3. Turn Off system restore on all drives.
   • Properties on My Computer
   • Go to Tab System Restore
   • Check enable “Turn off System Restore on all drive”
4. Resize maximun size of recycle bin to 3-6%
   • Right click Proterties Recycle Bin
   • Change value slide bar Maximum size of Recycle Bin
5. Change your virtual memory size use your memory * 1.5
   • Properties My Computer
   • Goto Advanced Tab
   • Perfomance > Setting > Advanced Tab
   • Click change on Virtual Memory
   • Select option “Custom size” and enter your setting
   • Click Set
6. Decrease your internet page history default 20 days to 5-8 days
   • Open IE go to Menu Tools > Internet Options
   • Setting change your “Days to keep page in history”
7. Use windows search files and folder search files *.tmp all physical drives and delete it all
   • Delete unnessory file *.tmp
8. Empty Temporary internet files every broswer is closed.
   • Properties your internet explorer
   • Go to advance tap and see Security section
   • Check enable “Empty internet temporary file folder when browser is closed”
9. Start > Run type %temp% and OK delete all show files.
   • Delete unnessory file in folder Temp
10. Disable Hibernate function.
    • Hibernate Function will use Hard disk space equal your memory installed
    • Open control panel
    • Open Hibernate tap
    • uncheck Enable Hibernation
    • Click apply
11. Clear Paging File every your computer shutdown.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
Set ClearPageFileAtShutdown = 1

Please be carefully when you change setting or config your windows registry and system files.