Tuba Mirum ,
Re Prevex, I installed it and my PC speed reduced drastically. Maybe due to Prevex or maybe an overload of defence softwares.
With Windows XP fam. I have a router (with firewall) run AdAware, SyyBot, AVG Antivirus, Norton AntiVirus and a ZoneLabs firewall. I guess that all added together makes the PC work a bit too hard.
Disabeled Prevex and I'm (nearly) back to normal.
