FYI--Another update to be concerned about. YMMV

http://www.theinquirer.net/inquirer/news/2447177/updategate-windows-10-is-resetting-default-apps-back-to-microsoft-stock

"WINDOWS 10 has a new trick up its sleeve. This time, it's 'restoring' app defaults to the bundled Universal Apps in the operating system.

A reader told us that, despite being a long time user of Irfanview as his primary photo app, he was greeted with a message saying: 'A default app has been reset,' only to discover that his new photo app was Photos, the bundled offering.

He traced the problem back to KB3135173, a cumulative update issued for February which was pushed out as an update last week. After deleting the update, he discovered the next day that Windows had reinstalled it, and reset the defaults again."