Constant freezes after update to latest windows 10

[jinpachi23]

Last day I've upgrade my PC to windows fall creators update using clear installation from usb stick (created by media creation tool). Yestarday everything seemed to work fine, but when I booted my Pc today the computer was freezing (nothing moves on display) every 1 second. Later I've discovered that it happens only when my second monitor is off. If both of my monitors are on - there are no freezes. If I disable second monitor in windows settings (only display 2) freezes also disapears. Later I've swaped the cables, so my main monitor is indexed as [1] and second [2] and there were no freezes on monitor 1, but there were on 2.

Because it can be very confusing I will write everything one more time using a table:

monitor 1 on    monitor 2 on   freezes on monitor 1    freezes on monitor 2
true               true              no                     no
true               false             no                     -
false              true              -                     yes

No matter which monitor is marked as 1 and 2 in windows, results still the same

My spec:
graphics card: rx 480 (latest driver 18.5.2)
os: windows 10 eterprise (1803)
monitor 1: Iiyama g-master ge2488hs
monitor 2: Samsung EU40EH5300

Please help, sorry for my english

 

[R0GG]

I would as first intention try to reinstall AMD Drivers on top of the windows update that had probably ( as usual) messed up AMD previously installed drivers.