If you set your Windows to automatic receive Windows Updates, usually after the updates had been installed, you will be prompt to restart you computer. Even if you hit the Restart Later button, the annoying popup will prompt you again to restart you computer. This is annoying if you not really in the mood to perform a system restart in that moment.

Here are some simple trick to make the annoying popup disappear:

1. Go to Start Menu > Run, then type sc stop wuauserv. The popup shouldn't bother you again.

2. To permanently disable the annoying popup, go to Start Menu > Run, type gpedit.msc. Navigates to Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Windows Update. Double click No Auto-restart for scheduled Automatic Updates installations, choose Enabled.

[Via: onSoftware]