GF had a small (like 10') laptop, and I had a really hard time finding what the biggest issue was...

Windows failed all update because there wasn't enough space left on the drive, but it never said it.

After a lot of error, it finished by saying he'd like an external storage, and allowed me to use a usb key to run an update.

... but half the stuff still failed...

Also, it refused to run it on a microSD card, dunno why.