I was having the same problem as both of you, first i wasnt able to log on and find anyservers because my firewall wasnt getting shut down when I "shut it down" it was still running in the back ground for some reason, net showed me what was happening and we uninstalled it and reinstalled a better firewall and it works great, as for not finding the install that you downloaded, did you do a file find for it on your computer? maybe you can locate it that way. also did you download the patch for CS when you reinstalled? from like 1.001 to 1.005.
as for acid, I was getting logged on to a server and then almost as quick I would get booted off, I am sure you have done this but when it would do that to me I would shut down steam and start back up and then it had an install for me to download before it would run the game, which I did and it fixed the prob so I dont think this is going to be any help to you cept it sounded like the same problem. and I am sure you have your game set to autoupdate right?
as for acid, I was getting logged on to a server and then almost as quick I would get booted off, I am sure you have done this but when it would do that to me I would shut down steam and start back up and then it had an install for me to download before it would run the game, which I did and it fixed the prob so I dont think this is going to be any help to you cept it sounded like the same problem. and I am sure you have your game set to autoupdate right?