I have PC Bug Doctor (purchase version) and it's good. They sent me a free gift of a PC memory optimizer (Regularly $24.95) plus a popup blocker program which I really don't need. The optimizer is supposed to speed up function. Does anybody have experience with optimizers? Are they any count? My system is only 300 mhz Celeron, 4 gig HD, 190 ram, Win 98 SE.