Tune up utilities 2009 is an amazing piece of software that i have come across and i have been using it succesfully for about 6 months now. its absolutely fantastic and takes care of the complete pc health and keeps monitoring critical issues incl windows registry entries. it also can help 'program' the Windows by letting the user change the windows start up page et al.
absolutely fantastic gui and easy to use features make it easy for even a grandmom to use it.
its easily downloadable from the net. u just have to google for it. the actual software comes with a 30 day trial version but there are numerous cracks available on the net, which one can use with ease.
so happy tuning up.