This is also one of the most common problem with Microsoft Windows users very frequently complaint. This is something like when we install Windows XP or Vista first time there we may found that there is enough space available to operate system application but as time passes, the space you have earlier slowly goes eaten up but you don’t know why? (Even if you don’t install any new application.)

This is caused mainly because of system restore functionality (Though this feature I found useless at the time when I need it most, like when I experience any virus attack or any sever malfunctioning as it seems this is the first feature attacked by the most virus to making it unable to restore the system properly) and the temp files store in temporary folder. if you don’t know about system restore you can visit Here to know more about it.

Now lets find how it works…. Suppose you have installed any new hardware or software then the  system restore feature automatically creates a new restore point and this process is repeated every time with a new installation again, keeping the previous record in the history thus consuming your hard disk space. However with first installation Windows reserve about 15% of Hard disk space. But if you want you can customize this space to have minimize restore points, gaining more space.

To do it use a command line tool to reduce the amount of drive space that system restore takes

Go to Start>All Programs>Accessories>Command Prompt and right-click command prompt.

Choose Run As Administrator, click Continue to accept the UAC prompt, and then type this command:

vssadmin Resize ShadowStorage /For=C: /On=C: /MaxSize=1GB

Press Enter to execute the command and then type Exit (then press Enter again) to close the command prompt window.

Maxsize is the amount of space you want to reserve for use with system restore.

Now to delete temp file  Go to Start>run and press enter

in the run window write “%temp%” without the quotes and you will be popup with the temporary files location folder delete all the files there and you will free up the space used by temp files.