52 GB gone the next morning. Help is needed.

I'm not sure how this happened. My disk is 139 GB and I had 52 left. The next morning I get on my laptop (which is today) and, mysteriously, all that is left is 86 megabytes. iTunes was opened and there was a message saying that 'iTunes cannot complete--- Due to the disk drive being full---' So I decided to see how much space was left (I don't have a clue what iTunes was trying to accomplish...) and I saw that 52 gigs was gone.

I checked all my Local Disk folders to find that nothing odd occurred, as well as checking my desktop items, and the iTunes folders to see if anything had happened. I am still looking around, but so far, I have found absolutely nothing.

Please, assist.

Important things first
Anti Virus Scan
and
Scan with malwarebytes
http://www.malwarebytes.org/mbam.php

I've already completed a full Norton 360 scan... But I will try out Malwarebytes.

Hello Something, welcome to Vista Forums!



Just to know for sure, have a look at the tutorial at the link below; be sure to post back with the outcome.


How to Change the System Restore Disk Space Usage

The loss of HD space is most likely to be caused by Vista indexing, System Restore and Shadowcopies.

Hmm... When I type in "vssadmin list shadowstorage", Command Prompt says, "No items found that satisfy the query".