I have not had any problems with my install of
home or xp pro (coke corp.) they are both on the same computer.
What I recomend to keep the computer running smooth and for free legally.
If you do not have a virus scan program try AVG http://www.grisoft.com/doc/1
To protect and remove get Spybot http://www.safer-networking.org/en/download/
make sure to update it and then select immunize (When installing it I do not install SD timer I do not like having unnecessary things running)
To keep it clean I use Ad-aware personal about once a month http://www.lavasoftusa.com/software/adaware/
You can clean the registry with this fix some errors also RegClean http://www.pcworld.com/downloads/fil...id,4666,00.asp
After I run regclean I like to condense the registry with NTREGOPT http://www.larshederer.homepage.t-online.de/erunt/
They also have a reg backup program you can use, I would recomend backing up the registry with Erunt or Spybot
To optimist boot time run Bootvis If you do the stuff above I recomend a restart before running it. http://www.softpedia.com/get/Tweak/*.../BootVis.shtml
Last use diskclean followed by a defrag