I'm using Windows 8. I dont want to turn off all Windows updates. Only ones related to microsoft office. (I have office XP version).
It's a little bit to much text to type here IMHO. It's well described at this location
Open the Windows 8 Control Panel.
The simplest way to get to Control Panel is probably from its shortcut on the Apps screen but the Power User Menu is great way too if you have a keyboard or mouse.
Note: If you're on the Large icons or Small icons view of Control Panel in Windows 8, choose the Windows Update applet and then skip to Step 4.
While there are several options here, most people either: a) want updates to install completely automatically, or b) don't ever want an update to download or install by itself.