Windows tends to store a ton of temporary files that, over time, tend to fill up your hard drive.
are a number of places to look for these files and a couple of things
you can do to periodically purge your system of files you don’t need.
First, right-click on your C drive and select "Properties". Then click on the "Disk Cleanup" button on the main tab.
You can also look in C:\Documents and Settings\Administrator\Local Settings\Temp
And look for bloated temp folders in here.