black screen, help

Question

Hello, I need urgent help. yesterday I installed a third-party theme on my windows 10 and the screen froze, so I pressed the power button to turn it off, when I went I turned it on again log in as normal but the screen was black, I turned it off and on again, but this time I could no longer log in. I use peripherals, but when I try to execute commands I don't allow it and the cursor only appears when I move the mouse.
Sorry for mi bad english.

Answer 1

See OPTION SIX Boot to Advanced Startup Options from a Hard Reboot in this link:
https://www.tenforums.com/tutorials/2294-boot-advanced-startup-options-windows-10-a.html

Power on the computer > when you see the computer manufacturer's or Microsoft icon power off

Repeat: Power on the computer the second time > when you see the computer manufacturer's or Microsoft icon power off

Repeat: Power on the computer the third time > wait for it to open Windows Recovery Environment (RE)

Then perform a system restore:

https://www.tenforums.com/tutorials/4588-system-restore-windows-10-a.html

If you're unable to open Windows RE on the problematic computer then find a working computer to create a bootable Windows 10 iso:

https://www.microsoft.com/en-us/software-download/windows10
https://www.tenforums.com/tutorials/9230-download-windows-10-iso-file.html
https://www.tenforums.com/tutorials/2376-create-bootable-usb-flash-drive-install-windows-10-a.html

See OPTION FIVE Boot to Advanced Startup Options from Windows 10 Installation USB
https://www.tenforums.com/tutorials/2294-boot-advanced-startup-options-windows-10-a.html

Then perform a system restore:

https://www.tenforums.com/tutorials/4588-system-restore-windows-10-a.html

.
.
.
.
.

Please remember to vote and to mark the replies as answers if they help.

On the bottom of each post there is:

Propose as answer = answered the question

On the left side of each post: Vote = a helpful post
.
.
.
.
.