Screen Saver Keeps Resetting Itself to 10 Mins

This keeps happening after the update a couple of weeks ago. I set it to 30 mins, it resets itself to 10 mins. No viruses, no malware on my system.

Any suggestions much appreciated.

If you suspect an update I don't see any alternative but to look through them and see if any seem remotely related to the issue. If none of the updates bean on the screen saver then process of elimination may be the only solution.

The "easy way" may be if you have a Restore Point from just before the updates.