My computer got hacked

[Mehmet752]

I get a black desktop with no abilitys to do anything 

[Lil_Boy_Blue]

Hi

First please try this...
https://support.hp.com/us-en/document/c01684768/

This works for most HP Laptops (and some Desktops)...

To perform a power reset on a laptop with a sealed or non-removable battery:
Turn off the computer.
Remove the computer from any port replicator or docking station.
Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.
Unplug the AC adapter from the computer.
For most laptops, press and hold the Power button for 15 seconds to reset.

To perform a power reset on a laptop with a sealed or non-removable battery:
Turn off the computer.
Remove the computer from any port replicator or docking station.
Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.
Unplug the AC adapter from the computer.
For most laptops, press and hold the Power button for 15 seconds to reset.

[WAWood · Accepted solution]

@Mehmet752

A black screen indicates that no boot files have been read and no OS is being loaded -- which nearly always indicates a dead or failing hard drive.

If your PC is new enough to support UEFI, you can use these steps to test the hard drive: http://support.hp.com/us-en/document/c00439024
 
If not, you have to follow these steps:
1) Press Esc key repeatedly, several times a second, while rebooting the laptop. Do NOT hold the key down, just press it over and over.
2) Eventually, you will see an HP Startup Menu -- that will look similar to the image below ...
 
3) press the Function key for testing the hard drive (usually F2) and let it run.
 
Please report back the test results.