I have a acer aspire windows 7 computer. Keeps reading press f2 to start. Won't move past

[wbcp_4]

I have aspire windows 7 stuck on press f2 to start and does nothing

 

[2sidedpolygon]

Try rapidly pressing it

 

[Alabalcho]

What else is reported apart from this message?
Can you enter BIOS? Do you see your hard drive / SSD there?

This message usually is displayed when computer can't find a drive to boot from, with <F2> going to BIOS setup.