New Windows 10 Insider Preview Fast and Skip Ahead Build 17666 - May 9 Insider

New feature: Sets can no longer be disabled in Settings/Multitasking. That's nice. It is in group policy, however.

How to Enable or Disable Sets in Windows 10

Continuing feature (as of the last few buuilds): Certain Win32 windows are very laggy when closed, as if a ghost of them hangs around for a few seconds (sometimes several seconds). Very annoying. Originally, it was thought that this only applied when Sets were disabled, but that's not true here.

Continuing feature (as of the last few months): The notification center still handles Outlook notifications incorrectly, stacking them up indefinitely until manually cleared from the notification center. It always used to be that they'd disappear when you read the mail.

I've just finished cleanly installing April (2018) Update on my computer. Most apps are in place, now to make a backup in Macrium, and then use viBoot to upgrade to 17666 (what a build number!) and see how well that works.

rseiler said:

New feature: Sets can no longer be disabled in Settings/Multitasking. That's nice. It is in group policy, however.

How to Enable or Disable Sets in Windows 10

Continuing feature (as of the last few buuilds): Certain Win32 windows are very laggy when closed, as if a ghost of them hangs around for a few seconds (sometimes several seconds). Very annoying. Originally, it was thought that this only applied when Sets were disabled, but that's not true here.

Yup!...

CallMeSteven said:

. Running as fast as ever here. Have 16 Gig Ram. If you have only 8, that could be the reason?

I would be very surprised if only hsving 8 GB Ram is an issue. This is almost certainly not the issue.