part1: have u played with the BIOS??
it happens that a Processor have a fixed multiplier, in ur case (as its a 200Bus Processor (on DDR). so makes ur multiplier = 1333/100 = 13.30
now u might have changed the FSB to 66Mhz FAB, as multiplier = 13.30 remains the same, so now makes ur clock speed as 66X13.30 = approx 900Mhz,
get it changed to 100Mhz once again (either by small switches on mobo, or BIOS)
2ndly, u have got pop-up/adware installed, there is only 1 way getting rif of that, 1: by usingn ad-ware/spyware remover
2: using McCafee (that rocks)
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"