Bought a new laptop last week running Win 8.1 so decided it was maybe time to allow updates on older Win 7 lappy (turned off auto update back in Feb since it always slowed it to a crawl several times a week while I was trying to work).
The best part of two and a half hours later on a reasonably fast connection, it announced 41462 files had been changed/installed/configured. All those in just two months!!
No apparent problems afterwards though, touch wood.