Windows 10: Very long boot and black screen

So recently I have been getting very long boot times, not sure how long as after 20 mins I get bored and walk off. After silly amount of time trying to boot it comes to a black screen with a mouse curser. Ctrl + alt + del does not work but I found pressing start + r and typing explorer.exe makes everything work. Any solutions?

I installed some Intel drivers other day while rooting my tablet, maybe this is the issue?

:)

 

Boot time in Windows 10

Why does Windows boot slowly after dual boot with Ubuntu?

I used to use Windows for my work and It used to boot very fast. However, after dual boot with Ubuntu, my windows boot time became very long, it was annoying. I deleted Ubuntu, FORMATED ALL DRIVE, devided partitions, reinstalled
Windows but it is still not better. FAST BOOT IS ENABLED, no start up app, no firewall, no antivirus.

After windows logo 10 sec, boot is stucked in black screen 10 sec, and no background image in login screen
(My laptop used to boot just in 8 sec before dual boot)

 

10 minutes to boot Windows 10

I upgraded my Dell Latitude 5540 from windows 7 to Windows 10. Everything seemed to go well. It now takes 10 minutes to boot my pc. The logo appears, then a black screen for a very long time, with little or no disk activity for 10 minutes, then it starts
disk access and I get to the login screen. After login operation seems ok. What could be causing such a slowww boot?

 

Update: I uninstalled all the drivers I installed for the tablet root. Still an insanely long boot time. I noticed that leaving the black screen for some time and it eventually loads up without having to do the Explorer.exe solution. Any ideas to what could be causing this sudden decrease in boot time?