Steam erased my other games, I don't know how, I don't know why. But it happened. I had my games installed in D:\Games, I installed Steam there as well. After a dozen few attempts to download Cstrike and DoD, I uninstalled steam to reinstall it to see if it would still crash. I just went to check the file size of the directory and I noticed my games were missing. It plainly erased them, the games are still listed under add/remove programs... This isn't the first time this happened, back in open beta, when I uninstalled Steam it deleted my Halflife folder just for kicks. But it didn't touch the other games. I don't understand how such a thing could happen...