My computer restarts again and again not even finishing the windows start up. I already checked the AVR, but it is connected properly. What will I do to solve this problem?:(

What is AVR for you? Sorry but do not know what that is, thanks.

This could be a number of issues. We need more information. Does the PC restart everytime Windows loads? What are your hardware specs? The likely issue could be heat related. Are your PC fans operational?

Where or when do you see AVR?

Automatic voltage regulator -- avr ?