If you can’t seem to get rid of missing executable error at all, you should dig deeper by checking your other applications by removing or disabling them one by one in order to narrow down the possible causes.
Certain applications like security software (antivirus, anti-spyware, firewall), P2P clients, FTP/web server applications, IP filtering/blocking programs, download managers, VPNs, may cause Steam or its games to crash or connectivity to be interrupted. Some applications or programs may negatively impact the performance of Steam. Check out the solutions for a corrupted file or cache below. Fortunately, a cache issue with Steam can easily be fixed. Sometimes, a file or the entire cache may get corrupted or outdated, which can lead to problems. For example, downloaded contents are stored separately and are treated as cache. Steam application uses temporary files in order to do certain tasks. If your Steam app keeps saying that it’s blocked or unable to open, you must tweak your antivirus or security software settings to exclude Steam when it’s doing a scan.
