Black Screen with moving Cursor

Many of you guys frustrated when you start up your Computer and after booting you will
be presented with a black screen with moving cursor.
The main reason behind this is your some  primary drives are  Converted to Dynamic
due to malicious software or your Computer is affected with virus.
To Solve this go through following steps:-
1.press CTRL+ALT+DEL at black screen then  windows task manager will be opened.
2.Now click on File then click New Task.

3.write "explorer.exe" without quotes.
4.Now your Screen will come.
5.Now Scan your pc and repair. 

Blue Screen Of Death

These types of problems are very frustrating mainly occurs when you update your bios or install
a malicious program.
To solve this issue follow the following steps :-
1.open bios set up by pressing F2 (it varies from laptop to laptop), when your computer restarts.
2.Now go to configuration tab and select sata controller mode.

3.Now check which option is enable . It may happen your options are different like native & ide etc but don't worry.
4.Always select the option which is opposite to previous one.
5.now press F10 (save and exit).