I experienced a similar issue and it was 'system restore' eating up drive space
My resolve was to do the following
1.open 'my computer'
2. R click 'properties'
3. Press the 'disk cleanup' button
4. When the next window opens, L click the 'more options' tab
5. Go down to the 'sytem restore' area and L click 'cleanup'
Answer 'yes' to the delete all but the last system restore point
6. System will start disk cleanup and leave only 1 system resore point
*note* *note* *note*
You might feel uneasy about only 1 system restore point but in my case. I do
regular backups with Ghost2003 and system restore never fixed anything for
me anyway

thanks for your replys guys.

i did that and i got about 4.5 gigs of free space but it still keeps goin down.

Clean out temp files/history/cookies.If you got very little drive space left you need to put some or all of your files to disk/floopy or buy an internal or external slave drive of a few good gigs size.Sytem restore well move the slider on how much space to use to 2%-%3.

If you do not make HDD space your pc will crash your HDD is way to full.Try a disk cleanup.Once files/pictures are put to disk and you have checked they acctualy are on the disk as mistakes can be made then delete them off your pc.Once you have bought a slave drive you can store all files on it.

Enable compression on C:/ drive.