This year,
I have try the new Systemworks 2003 and NAV 2003 too but I don't know why but the 2003 version is much buggy than the 2002 version who was more stable
For the moment, I'm with some McAfee products who are better
And they are very good tools for the cleanup or registry like JV16 Power Tools and System mechanic
My advice is stay away from Systemworks this year