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Slow Login-Screen

I haven't noticed when exactly I started observing the extreme slow down of the Windows 10 login screen on my laptop.

Sometimes, this screen is fast as it was normally; but once in a while after pressing the power button I have to wait about 5(!) minutes staring at pre-login screen. I apologize for phone made images of the screen.

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In addition to that, the responsiveness has decreased dramatically. The reaction to button press is delayed by approximately 1-2 seconds!

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After I enter my 4-digit PIN-code, I wait for about another minute for the Desktop to appear... What on Earth can cause that and where do I start troubleshooting? I inspected the Task Manager for any CPU hungry processes and disabled Windows Defender (yes, I know...) which was consuming a LOT of resources. That did not help much...

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Relevant notes

  • I am not 100% sure, but I think that the extremely slow logins happen after my laptop is asleep for more than 4-6-8 hours ("deep hibernation" may be?) If I put the laptop to sleep and come back within an hour, it usually behaves nicely.
  • The laptop is roughly 5 years old: Samsung XE700T1C-H01RU
    • Intel i5-3317U, 2 cores @ 1.7GHz
    • 4 GB DDR3 RAM @ 1600MHz
    • Samsung MZMTD128HAFV 128Gb SATA Gen3 / mSATA 6Gbps SSD
  • When login is slow, after-login experience are slow as well for a few minutes. In less than 5 minutes the machine is fully functional again.
  • I could not directly associate slow logins to any OS update related activities, but that's not easy to do in the first place.
  • winver: Windows 1607 OS Build 14393.1884

Update 1 QuickSearch shows that there are many more users on 1607 version who experience same issue.

  • I also see this in 1607 on my tablet. seems to be an issue with one of the last updates. – magicandre1981 Dec 29 '17 at 7:10
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This was driving me crazy for the past week or so. Then I remembered that a recent change I'd made was plugging my USB keyboard into a USB hub instead of straight into the back of the PC.

Once I switched back (no longer using the hub), the lock screen doesn't have a delay, and I can type my password in immediately.

So the root cause was that the USB hub must have been slow.

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