questions;
1 . Are you running windows 8.1 ? I am asking because the search I did found a lot of win 8.1 users having that issues and win 10 upgrade was the issue, which points to internal issue with operating system.
2. are these crashes happening with all steam games? all origin Games ? are you running the origin overlay at the same time as your launching steam games and vice versa ? I am asking because they are known to sometimes interfere with each other
3. do any steam game you install run properly at all ? maybe consider a quick uninstall of "steam application" and install a fresh copy
4. have you tried in steam the following, right click on steam icon bottom of your screen , select library, on the left where your games are listed right click on it and select from pull down menu "properties", a new window will open, select the tab called " local files " then click on "verify integrity of game cache", if perhaps there was a problem during the download of the files, it may be corrupted and the program will; deleted them, then try to launch this game and see if it still crashes. if this solves the issue repeat the process for each game you have in steam.