Help! Hard Drive Problem!

[SMASH]

So I went to bed one night and woke up the next morning to find my Hard Drive was completely full... I was like wtf... so I cleared 10 gigs and went back on my merry way. Then that re-filled too... WHAT THE HECK CAN CAUSE MY HARD DRIVE TO RE-FILL?

I have Norton's 360 and have run multiple virus scans but it finds nothing...

[Syuusuke]

Do what your name suggests. Do it.

Look up what files are taking up so much space. The bigger the file, the bigger the square.

Spacemonger (http://www.download.com/SpaceMonger/3000-2248_4-10050288.html)

[Sel]

Are you installing something through steam, or something?

[Reaper Man]

Empty Norton protected files from your recycle bin.

[Evil_Monkey]

System restore points maybe?

[SMASH]

I found out that I have a 238 gig .log file named Cldma.log clogging everything up... so I'm gonna try and remove it outside of windows... any ideas?

I did some research and it's from this crap PowerDVD software that I actually uninstalled but it left this crap... how do you remove a file outside of windows?