Privacy Cleaner / Windows 7

I have been using CSC with no problems until today. I go to Privacy Cleaner do the scan and then delete the files. At that point I get an error message and a request to send a file to Comodo (which I have done). I have turned off all entries but one to see if I was messing with a reserved file or something. The problem continues. I have done a few things to W7 today - moved some icons around - mostly just tweaking. Stuff I have been doing with no impact before. Anyway…should I uninstall and reinstall and see if that makes a difference or are there reported errors and I need to change some setting somewhere…

Thanks.