i recently installed a new canon pixma mp130 all in one.since install my windows defrag. program will not work,aldo any third party defrag programs either.regseeker 1.45 will not load or loads very very slowly.worst of all i can only shut down computer via switch on box.system is pentium 4 3.4ghz ht.512 mb ddr ram and was working with zero faults till addition of printer software.i have reformatted and carried out total reinstallation but to no avail.any ideas please.