Has your Windows 10 machine been plagued with slow sign in since the major update in November 2015? My desktop machine has. Running from an SSD the computer will reach the lock screen in seconds as usual. But when I enter my pin, the computer now takes 20-30 seconds to reach the desktop. Previously it was only a few seconds. Since the major update in November there have been a few minor updates released but none have fixed this issue. Yesterday evening I was searching for a solution again and I saw one mentioned I thought was mad. Surely this wouldn't work. How could something so simple cause such a problem and why wasn't this caught in testing?
The problem? Auto hiding the taskbar. My Desktop PC was set to auto hide the taskbar. I read that this was the cause of the problem. I didn't believe it. I assumed it was someone trolling a tech forum. I tried the fix anyway. I unticked the box marked "auto hide the taskbar". And lo and behold. My PC now reaches the desktop from the lockscreen in two seconds. Two seconds! Ridiculous a bug like this gets through testing. But anyway, I hope this fix works for you.