How you can prevent that? I have antivirus but everyday you open firefox or program but later it start slow like every month it slow like 5% of performance is drop until you become angry with slow pop from any program like firefox got 30 sec to start but really when computer have new install on win xp pro it got 5 to 8 sec.
And It hard for me to tell everyone when they use my computer I told them no bad website or porn. Worse thing they thought game website is fine. wrong it make slowest like ram was 256 mb but really it 786 mb ram plus when run avg antispyware found 100 infections.
That why I thought try this so I won't call microsoft for product key to active it.