Tried an earlier version of this piece of .... whatever, and it totalled my machine. Its first trick was to tell me that my autoexec.bat file was wrong and that it could fix it. I have since found that this is a 'well known error' because there was nothing wrong with it and its 'fix' in fact corrupted my file so I had to re-write it from scratch - great fun! NOT!
I can however VERY STRONGLY recommend Norton Utilities (any version). This really does do what it claims, and only what it claims. Been running it now at home for about 18 months and it has gotten me out of SO many f.ups that I have lost count.