You might have bailed out of the "erase" process incorrectly, thus leaving a huge Temp file on your computer.
There're two ways to fix this - (1) right-click the recycle bin and from the context menu select "Erase Recycle Bin (1-pass pseudorandom data)" , let it run with OUT messing with it and see if that fixes the problem.
If not, here's the old way to dump that file: "Q: "After running Eraser the free space on my drive was lost or reduced noticeably. How can I fix this?"
A: It could be that either Eraser was terminated abnormally or the system crashed causing the temporary files not to be removed. You can remove the folder "~ERAFSWD.TMP" and all the files in it to reclaim the disk space (open command prompt and type "deltree X:\~ERAFSWD.TMP", where X is the drive letter). (On my XP Pro computer, I have to use " del_C:\~erafswd.tmp " ).
Hope this helps. Pete
*And by-the-way, devs - how come this isn't in the FAQ anymore?