I'm not a techie but it seems very odd that it would take several days to run the cleaner. It's on the third day of running almost consecutively. Currently, it's saying:
Advanced
Wipe Free Space - Drive C
About 14 hours, 21 minutes remaining
56% (167,619 MM of 295,527 MB)
System info: MS Windows XP Pro SP3
Intel Core2 Quad CPU Q8300 @ 2.5GHz, 3.0GB Ram, NVIDIA GeForce 9800 GT
Any suggestions???