windows 7 problem... what is happening to my computer??

hi I don't know if it's due to windows 7 or virus or anything else. I am having serious issue with space on system drive. I have not installed a lot of things but the system drive always like to run out of space. I keep cleaning the browsing cache and temporary files, but the space on system drive often drops to 0kb which causes a lot of headache you can imagine. A lot of time when I reboot the computer, the space gets back to 1GB. I just rebooted windows an hour ago. At first, I checked the space, it became almost 1GB again, and after a few minutes, it grows to 1.36GB and now 1.47GB. (Of course I didn't delete anything during the time) I don't understand what is happening. I am so frustrated about that.

Hard Disk Space - Free Up and Recover



Install WinDirStat which will show you a graphical map of what's eating your disk space so you can understand it better. You can adjust the size of paging file or turn off Hibernation to save disk space.

Go over your system thoroughly with the Troubleshooting Steps for Windows 7
which will familarize you with Win7 much more closely and help uncover issues and how to deal with them.