I have a HP zd7000 laptop running xp home. It has been crashing. At first just when printing sometimes, now it is always when printing, and sometimes when web browsing. I had formatted the hd (thinking it was a virus), I have swapped out the ram (with ram from another laptop- that made it worse). The temp is about 40C. I am contemplating purchasing a registry cleaner program. Is this a hardware or software issue? I am also contemplating swapping the hard drive to my other laptop to see if it will print/run on the other laptop? Are these things a possible solution to my problems, or am i just wasting my time? Any help would be appreciated. I am getting very frustrated.