Windows 10 Insider Preview Build 17101 Fast + 17604 Skip Ahead Feb. 14 Insider

CountMike said:

DriveRs or Drives ? Optimize DRIVES works here.

Drives, sorry for the typo, when I click on "optimize" it seems that the process started but it doesn't, I have seen comments in the Feedback hub about it since the previous build.

Jack07 said:

Installed 17101 overnight so I don't know how slow it was.

Bluetooth pair still doesn't work well, got a bsod bluetooth related when i tried to mess whit it then another one just after that reset.
I also have a Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.261.1230.0) - Error 0x80070643
which the troubleshoot can't fix.

Everything else seems fine for now.

In 17604 I am getting Windows Defender update failures with error 0x80070643. Windows Defender also fails when it tries to update itself and Window Update MiniTool also fails with Windows Defender update. May be a server-side problem.

If you have WMP set as the default video player this will appear when you open a video:

Basically they invite you to use Movies and TV and they explain the advantages of using that app instead of the WMP, I realized this today thanks to a task in the Feedback hub, I have MPC-HC established as my default video player, so I had not noticed this before.

@CountMike
@tracit99

Windows Defender update still doesn't go through here. I don't think it's a sever issue since the download shows as OK.

From what i see Defender is already updated, might be something messed up with the windows update.

Very interesting this, the map of active insiders: