OK, Valve's first mistake was, you guessed it, Steam, but this really makes me angry. I got the newest update of the Source SDK, and it is causing my computer to encounter some serious problems. What happens varies, after about 30min-1hour of mapping, an error comes up saying, "the application failed to initialize properly" then some hex, and my taskbars dissapear, all my desktop icons dissapear, and I lose access to all of my drives. Sometimes the computer will even spontaneously re-boot, corrupting any map that your working on whether you've saved it or not. Im running XP Service Pack 2, 512RAM, and im not asking for answers, im saying that it is serious that Valve fixes this. Tons of people are having this problem that have posted at the VERC, and if you have this problem, email Valve at sdk@valvesoftware.com
I did, but if more people do, its more likely they will try to resolve it.