[Solved] Windows 10 Spring Update 1803 broke Attract Mode

[Oomek]

It's just great. I've recently updated Windows 10 to the latest 1803 version and it appears that it broke Attract Mode and Mame.
When I launch AM I get two 3 second delays where AM becomes frozen and unresponsive.
When I go back from Mame to AM I have to alt-tab because AM stays frozen.
In Mame I've lost HLSL scanlines.
When I exit Mame I get also a delay of around 5 seconds before the process terminates

Well done Microsoft.

Does anyone else stumbled across those issues?

[xbs]

No problems here with AM and 1803 build.

[Oomek]

A quick follow up. If you see simillar symptoms, disable Focus Assist in Windows Settigs->System
If you have no scanlines in mame disable shader cache in your GPU settings.
Clean install of GPU drivers also helps.