Windows 10 takes a LONG time to login

A couple weeks ago, my Windows 10 computer started taking a LONG time to login. The times have been going up and down, with a max of about 15.5 minutes, which happened today. Here's what I've tried to solve this issue:

1. Do a clean boot (no startup programs or services other than Microsoft services).
2. Defrag/optimize hard drive (not SSD).
3. Run CCleaner and Malwarebytes.
4. Check the Event Viewer.

Here I found multiple warnings and errors:

1. Event 6005, The winlogon notification subscriber <Profiles> is taking long time to handle the notification event (Logon).
2. Event 7022, The Connected Devices Platform Service service hung on starting. (and a few like it, only with different services)
3. Event 6006, The winlogon notification subscriber <Profiles> took 936 second(s) to handle the notification event (Logon).
4. Event 6004, The winlogon notification subscriber <GPClient> failed a critical notification event.
5. Event 6001, The winlogon notification subscriber <Sens> failed a notification event.

After some googling, I continued with the following steps:

5. Disable "Always wait for the network at computer startup and logon" and "Run logon scripts synchronously" in the Group Policy Editor.
6. Do an in-place upgrade/repair.

There are probably some other steps I've missed, but I think that covers most of it. I'm fed up with this problem, but I really don't want to have to reinstall Windows. If anyone has any solutions or ideas, I'm open to anything at this point.

Thanks in advance!

JFischer00 said:

A couple weeks ago, my Windows 10 computer started taking a LONG time to login. The times have been going up and down, with a max of about 15.5 minutes, which happened today.

Was "a couple weeks ago" just after installation of the AU? If so, I'd suggest a clean reinstall.

pokeefe0001 said:

Was "a couple weeks ago" just after installation of the AU? If so, I'd suggest a clean reinstall.

No it was awhile after that. I got the AU first day. The only major thing I remember doing since installing the AU is following Tech City's video on optimizing W10 AU for gaming and power users. I made some of the changes he suggested, but not all of them.

Bump...