well in my expiernce with updates is. after i have many hous upon hours trying to get my flightsim looking the way i want it. i would take these updates then i would have very slow preformance from my pc. the the dreaded crash altogether. i do infact have the sp3 came with the computer when i bought it. and i have a anti-virus that if i go to a bad website will post a message to me saying this is a bad website ect. abort connection. so theres no worries there. but i think it has more to do with the updates. a family member of mine suggested it was the flightsim or the add-ons for it. but like i say i think it's more microsofts updates then the flightsim.
8 gigs of ram
3.10ghz processor windows 64bit