Well I installed CRC and marked to clean all entries (didnt look at anything, just marked all ;D) and it unregistered my defragment tool (the basic windows defragment tool that appears when you right-click on a hard drive).
Just that, not so important issue but I thought I had to report it.
One question, how can I register it again? I can use it clicking on the dfrg.exe but I want it back to tools.