Hi there!
Yesterday I installed SC2 on my new computer (after several months of not logging in…) and when trying to play I get a message “Cant connect to Blizzard services”.
I try to log in with my password and get a message saying “Error - Battle.net is down for maintenance. Please try again later.”
This is my status for the past 15 hours or so…
Maybe I did something wrong in the installation?
Thank you 
In these cases it’s always worth running through some connection troubleshooting, and clear the Battle.net App Cache.
If the issue persists, please upload your system files to pastebin.com and reply with the links to the files using the preformatted text option to encapsulate the links.