Gah I want to play the new Portal 2 update so bad but I've been without Steam for two months. Every time I try and install it (Steam), I get this error saying something along the lines of Steam.exe being deleted. It happens every time, and Steam is just mysteriously gone after that.
I've Googled the problem, but every suggestion I've tried hasn't worked.
GUESS WHO FIXED STEAM? I found a new solution and it worked yay. Just had to install steam, cancel the update, then update in safe mode with networking. WOOHOO!