Yup, my 500Gb SSD was nearly two thirds full... It's now back down to the size it was before the update.
Ta da! The other issue has returned. Menus won't open unless another window is open.
No window open:
Menu won't open.
Menu will open.
It does this with the menus on Start 10 too.
After a while, the problem goes away. Look at the time stamp on these images. It's now 8:52 and the menus are working. You can see my boggle...