Error 0x80070646 when running Windows Update

Problem When running Windows Update you get one of the following errors: “Error code 0x80070646” “Error 1606 Could not access network location %APPDATA%” “Error 646” Solution Set the AppData variable to the correct value.

Setting AppData to the correct value

In the event that the AppData environment variable has been changed it can cause problems with some programs running or installing. To change it to the default, follow these instructions: Click the Start button (Windows XP Users: Then click Run). Type regedit and press Enter. In the left column, navigate to: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\ Click on the… Continue reading Setting AppData to the correct value

Force Quit a program that is not responding on Mac

To force quit an application: Click the Apple in the top left of the screen and then click. Force Quit. Select the program that is not responding. Click the Force Quit button. You can also bring up this window by pressing cmd + alt + Esc.