Hello! I can't run steam help.

[johnedyy]

Hello, everytime I want to run steam this sign appears idk what it means?
please help if you know any solution. ^^
http://i.imgur.com/j5uLG.png

 

[unoriginal1]

Follow the steps here to resolve that issue

https://support.steampowered.com/kb_article.php?ref=3093-MKUJ-5773

 

[johnedyy]

Best answer selected by johnedyy.