None of the keyboard shortcuts works

Question

A few minutes ago I posted a quesion about my inability to use Command+Q to quit an application. This might be confusing. All of the keyboard shortcuts I normally use are not working, including the commands to copy, cut and paste. The quit shortcut is only one of dozens on the fritz. j

Answer 1

Logging into the temp account may not fix the problem if you incur it again. Something is fundamentally wrong in your main user account that would cause the problem. When you create the new user account and log into it, you are preventing a number of third-party add ons from loading:
1. Login Items from the Accounts preferences
2. Input managers
3. Contextual Menu Items
4. Preference Panes
5. User installed fonts
6. Preference files
7. User-based cache files
8. User-based log files
Items 2-8 are all located in the /Home/Library/ folder. When you create a new user account none of these items that may contain third-party components will be included in the new account. Any one or more of these could cause the problem.
Simply creating the new account should in no way actually fix anything. Rather it's a troubleshooting technique that helps isolate possible causes of a problem. That your system is now working properly is more likely a fluke.