For several months my computer is slow on everything. I have Windows XP Media Edition SP3, with all updates. I primarily use FF latest version. But whenever I change a tab, there is this long hesitation, a minute or more at times, worse late in the day. But, it is also the same when I have several programs running and change from one to the other, the hesitation is there. I have 1 gig of ram which is what I have for years but just wondered if that is part of the problem. I wiped the drive and reinstalled everything in December, have tested the hd, run all kinds of virus and malware testing, even online testers. I have Zone Alarm Extreme Security and run Malwarebytes regularly. Any ideas appreciated greatly.