Computer starting problem screen become black.

If you are facing problem to start your computer or laptop , before taking to the technician try one the following option . Hope it will solve the problem also you can recover the important data.
Following are the general starting problem , reason can be very in PC to PC . It can because of power, processing or boot sector damage.
When start the computer screen become black and computer not start.
When switch on the screen become black and computer not start.
After I log in the screen turns black. only can see the cursor.
Option 1:
Press Cont+Alt+Delete
Following options will come
Lock the computer
Log off
Change password
Task Manager
Shut down
Click on task manager
Click new task
write : explorer
Hit enter or click OK.
Hope problem should solve.
Option 2 :
Unplug the laptop.
Remove the battery.
Press and hold down the power button about 2 minutes.
Put the battery back
Start again.
This process will remove all the static electricity from the unit which allows system to run on fresh battery.
Repair the booting files in CMD mode

Option 3 :
Press F5
Restart PC

Option 4:
If you have a Windows installation disc:
Insert the installation disc.
Restart your computer. …
If prompted, press any key to start Windows from the installation disc. …
Choose your language settings, and then click Next.
Click Repair your computer.
Select the operating system you want to repair, and then click Next.
If you are frequently facing booting problem , means hard disc damaged and need to replace the hard disk.