1. Press Win+R keys together to launch RUN dialog box. Type services.msc in the

textbox and press Enter. It'll open Services Manager.

2. Scroll down to bottom and you'll see a service "Windows Update" in the list.

Double-click on it and set its Startup type to Automatic.

PS: Also make sure that "Windows Firewall" service is also set

to Automatic. Thanks to our reader OKI for this tip.

3. That's it. Close services manager window and now you'll not face any problem

while downloading any app from Windows 8 Store.

I don't see any reason behind disabling "Windows Update" service in Windows 8 as

its an important service which helps in protecting your Windows by installing latest

security and other updates released by Microsoft. If someone is using a pirated

Windows 8 OS, there are chances that the user disabled the service to prevent

Windows from installing updates which automatically detects pirated Windows in

computers. It might also possible that some users disable the service accidentally

which is rare though...