I have hibernate disabled with my SSD, so there is no fast startup option to disable. There's another thread where Windows 7 users are having similar issues of slow performance with 10508. I've switched the Ransomware Module back on, but setting the start delay to 30 seconds, which also has worked,. I have Avast (Free version) which some suggest may be a factor, but also noticed the problem of accessing Microsoft Office files has also returned again, whether that's linked to all this, I don't know.
Hopefully a fix will come out shortly.