PC keeps freezing in windows startup, POST and BIOS

I dont know whats happening, i cant use my PC.
Its always freezing no matter what i do.

I tried to switch ram slots, disconnect HDDs, hold power button
For 30 secs and nothing worked.

When i get to windows 7 sometimes the screen goes to sleep too.
What may be causing this? I checked all cables and everything is fine.

Is my motherboard dead?

Welcome to the Forum.

It could be many things.
Tell us the story of the computer and when it began to freeze.

Please edit your profile with ALL your hardware specs.

Megahertz07 said:

Welcome to the Forum.

It could be many things.
Tell us the story of the computer and when it began to freeze.

Please edit your profile with ALL your hardware specs.

I cleaned my PC yesterday with a vaccum cleaner and then it started to do this.
All jumpers are in the place and nothing wrong is connected. So i dont know whats
Causing this

Please edit your profile with ALL your hardware specs.

If the CPU fan spin with the vacuum cleaner, it can have damaged the fan.
Is the CPU fan running normally?

Megahertz07 said:

Please edit your profile with ALL your hardware specs.

If the CPU fan spin with the vacuum cleaner, it can have damaged the fan.
Is the CPU fan running normally?

Yes

Vacuum cleaner can cause static discharge. Test your memory.

Megahertz07 said:

Vacuum cleaner can cause static discharge. Test your memory.

I tried to switch both rams and slots but it keeps freezing

Take one memory stick out.
Boot from the installation disk - go to repair - un select the c:\windows - next - memory test.
When completed, shut down, remove the tested memory stick, insert the other memory stick and test it.

Megahertz07 said:

Take one memory stick out.
Boot from the installation disk - go to repair - un select the c:\windows - next - memory test.
When completed, shut down, remove the tested memory stick, insert the other memory stick and test it.

I dont have an installation disk, my windows is cracked

Kazurengan said:

I dont have an installation disk, my windows is cracked

What you mean by cracked?