1.Simple solution (to ignore the updates if it prevents you from shutting down without installing) Start -> Run
gpedit.msc
Administrative Templates / Windows Components / Windows Update /Do not Display "Install updates and shutdown" option
2.Complicated solution (better one in my opinion)
1. Close all the open windows.
2. Click the "Start" Button, click "All programs", and click "Accessories".
3. Right-click "Command Prompt" and click "Run as administrator".
4. In "Administrator: Command Prompt" window, type in " net stop WuAuServ " (without the quotes) and press Enter.
Note: Please look at the cmd window and make sure it says that it was successfully stopped before you try to rename the folder.
5. Click the "Start" Button, in the "Start Search" box, type in " %windir% " (without the quotes) and press Enter.
6. In the opened folder, look for the folder named "SoftwareDistribution".
7. Right-click on the folder, select "Rename" and type " Sdold " (without the quotes) to rename this folder.
8. Still in "Administrator: Command Prompt" window, type the command " net start WuAuServ " (without the quotes) in the opened window to restart the Windows Updates service.
Note: Please look at the cmd window and make sure it says that it was successfully started.
Exit and Reboot
Note: If the issue is resolved and you can successfully download and install updates, you can safely delete the SoftwareDistribution.old directory to recover disk space.