RS-Prerelease build 21343 is out to Dev Channel

These are still open problems with Build 21343.1000:

https://aka.ms/AAbab8p  Excessive time hanging file explorer when trying to mount a blocked ISO. Way over a minute before the message pops up. 

https://aka.ms/AA9pcvv  File Explorer hangs while browsing through folders of a mounted ISO that resides in Storage Spaces

https://aka.ms/AAa4rmm  Ease Of Access PrintScreen Hotkey for Snip&Sketch not working when Device Manager or Advance System Settings or Task Manager are opened in foreground.

https://aka.ms/AAayvn0  News and Interests and other features disappear after a scan "CHKDSK C: /F"

https://aka.ms/AAb4rf8  Manage Disks and Volumes shows internal SSD even when it is an HDD.

https://aka.ms/AAb9ekn  PasswordLess Option in netplwiz not working on Multiboot machines after Shutdown/Power up with Fast Startup turned on.

https://aka.ms/AAaij6z  Time to display list of operating systems unchecked set to 0 secs in multiboot systems, (Problem is back with build 21343.1000, it did not occur with previous 2 builds)

https://aka.ms/AAbnrjl  Snipping tool has 3 strange characters instead of 3 dots.

 "Snipping Tool is moving..." "Snipping Tool is moving…"

https://aka.ms/AAbnfl0  Unknown slider in Settings>Personalization>Lock Screen after upgrading to Build 21337+

https://aka.ms/AAbocb4  When File Explorer is in dark mode, the text typed in the search box is black, making it unreadable against the dark background.

https://aka.ms/AAbnm8y  Excessive delay on the Welcome screen after entering PIN to login, over 30 seconds in some machines.

In dark mode I see dark text on File Explorer search box, turns white after I click search

That last one in your list (time to display list of OSes set to 0) affected some of my multi-boot systems for this as well as the prior two builds.  It affected ALL of my 8 systems with 21343 but only affected a few at random in the prior two.

 That last one in your list (time to display list of OSes set to 0) affected some of my multi-boot systems for this as well as the prior two builds.  It affected ALL of my 8 systems with 21343 but only affected a few at random in the prior two.  

I have 2 machines with Dual Boot, I've seen this problem on and off on different builds, but not the 21332 and 21337, now it is back on both machines after W.U. went up to 21343.1000.

In checking on another posters issue with Search I found a different one.

If I open Search it is blank and then closes.

It did this 2 times in a row and then opened fine.

Subsequent times it opened blank, crashed, then opened fine.

There is a Search Application stopped working in Reliability Monitor.

Feedback filed here:

https://aka.ms/AAbnyf1

Resolved after a shutdown.