I see you have malwarebytes installed here...Please log in into the account where exe files won't run... in normal mode
Then, make sure extensions are shown, see here
how to do this.
Then, navigate to the C:\Program Files\Malwarebytes' Antimalware folder and locate the file mbam.exe
in thereRename mbam.exe to mbam.com
Then, doubleclick mbam.com. This will allow malwarebytes to open. First use the update tab and check if there are updates. Download the updates.
Then, perform a quick scan and let Malwarebytes remove what it found. Reboot afterwards. Malwarebytes should restore the associations for exe files again if run from the affected account.