Windows Booting very slow after 2004 update ,

I have a Surface Pro 6. It used to boot in approx. 10 seconds, after 2004 update it has become 90 seconds boot time. I was so annoyed.

That's why I am here in this thread.

After trying everything that listed here, I ran DISM, SFC, turn all the excessive processes off, etc. Nothing helps.

So I decided to click the reset button and gonna bite through installing all the apps again.

It works!

Now my Surface in back to 10 secs boot time.

And I'm on the way to re-install most of my applications.

I did the same to my Asus laptop - reinstalled 2004 that later updated to 20H2.  I also installed a SSD.  All went well until Microsoft 365 Outlook, each time launching, decided to ask me for a password for each of my four email addresses, Onedrive and pin number.  This would continuously happen - even sometimes wile I was using Outlook.  Not even Geek Squad has figured it out.  I delivered the laptop to them for the third time - have not heard from them in a week.

Hello @Jaavenor - this is a known Microsoft bug/issue, and some call it password "amnesia". It is a subtle bug in a scheduled task on some configurations, that ends up erasing a password decrypt key in LSASS:

Until Microsoft delivers a fix, its recommended workaround involves right-clicking the Windows 10 Start Button and selecting Windows PowerShell (Admin). If not there, right-click on the Start Button, select Command Prompt (Admin) then key in powershell. It depends on how your "start" is set up.

Microsoft then recommends:

1. Copy and paste the command below into Windows PowerShell and press Enter.
2. Get-ScheduledTask | foreach { If ((xml).GetElementsByTagName("LogonType").'#text' -eq "S4U") { $_.TaskName } }
3. If you see any Tasks listed from the PowerShell output, make a note of them.

Next, go to Windows Task Scheduler and disable any tasks you found from the above command.  Follow these steps:

1. In the Windows 10 Search box, type Task Scheduler and then open the Task Scheduler app.
2. Locate the task in the Window (e.g.HP Customer participation), or other task from the Windows PowerShell output.
3. Right-click the task and choose Disable.
4. After you disable the task, restart Windows.

Microsoft notes that users may need to re-enter missing passwords one more time before it is saved again.

Thank you very much for this info.  Much appreciated - matter has eluded me and Geek Squad.  I appreciate your help.

I did the same to my Asus laptop - reinstalled 2004 that later updated to 20H2.  I also installed a SSD.  All went well until Microsoft 365 Outlook, each time launching, decided to ask me for a password for each of my four email addresses, Onedrive and pin number.  This would continuously happen - even sometimes wile I was using Outlook.  Not even Geek Squad has figured it out.  I delivered the laptop to them for the third time - have not heard from them in a week.

That's brutal, my MS365 still working as it should be only asked my password once after the re-install. I guess I dodged that one. Good luck on your quest to repair this. :)