C Drive Space Keeps Filling Up (1 Viewer)

[Anthem]

Please help cos it's really pissing me off. My C drive keeps filling up - I have tried everything from scans and installing Bullguard free 60 day trial anti virus software. I managed to free up to over 1 GB yesterday but when I turn PC on again the friggin thing tells me I am running low on space. Everything! and that includes freeing up space manually by clicking into properties and using the free disk space function. I have even gone to the trouble of deleting a dozen cd's worth of music which worked temporarily but inevitably the same thing occurs. any suggestions ? - I am not very computer savvy so if anyone out there could provide me with easy to follow instructions it would be much appreciated. I am using Vista.

Cheers.