Today , when i start dirty bomb for 2nd time after 1 hour i get this error
Sign in could not be completed
Kirays
#2
Hello.
From what I know Steam is currently having issues with its servers hence you can’t sign in.
Give it a while, it should be fixed soon. 
saeedavril
(saeedavril)
#4
I get this error everytime i try running the game … i have windows defender (tryed turning it off); tryed reinstalling game,reinstalling steamT verifying game files, disabling windows firewall. I don’t know what to do, please help (windows 10 1703 last update 64bit ) ،1 years I did not have this problem with windows 1607 !
RobinHooj
(RobinHooj)
#6
Try installing windows updates. In my case this solved the problem. Probably only windows 7 is affected.