Windows 10: Can Windows Download Updates While PC is Off?

When I started my pc, I noticed there was an update that was pending a restart. I'm just kind of curious as to how it downloaded if my pc was off?

:)

 

Windows 10 forced download

^This, then reboot and go to manually update windows. Find KB3035583 in the list of available updates, right-click and "Hide this update" so it doesn't get installed again next go around.

 

Windows 10 forced download

To stop the download, uninstall the KB3035583 update (under "Control Panel > Windows Update > Installed Updates").


To get rid of the C:\$Windows.~BT folder:

• Right-click on your C: drive.
• Select "Properties".
• Click on [ Disk Cleanup ]
• After the initial scan: If you have a [ Clean up system files ] button, click it and wait for the second scan to finish.
• Scroll down the list and look for "Temporary Windows installation files" (its size should be in the gigabytes range); check the box.
• Click on [ OK ] to start the clean-up.

 

Who's downloaded the Windows 8.1 preview update?

For some reason the installer says the update is not applicable to your computer? (Win 8 Pro x64) anyone else try this what was released today?

http://windows.microsoft.com/en-us/windows-8/download-preview

EDIT: It appears the error is because the download is named Windows8-RT-KB2849636-x64 so looks like it's only for ARM based RT Windows 8 versions even though there's nothing suggesting that on the actual download page, so where's the x86 8.1 update people?