Beeping while "Starting Windows"

Hello
I've got problem with my Acer 5740g.
When I turn it on, after Acer BIOS screen Windows is starting. But while it's starting (screen "Starting Windows") i hear fast beeps. They repeated. It takes ~3 minutes.
Now when I press any key after Acer BIOS screen, but before "Starting Windows" it's not beep. But when it starts and i see desktop, menu launch automatically. When i have icons on desktop, all programs are starting up.
When i press any key soon after "Welcolme" screen it's ok.
It's really annyoing. I reinstalled my Windows. Without result.

Do you recognise any of the beep codes in this list?

Computer POST and beep codes

Troubleshooting steps here: http://www.computerhope.com/issues/ch000607.htm

I can't say what beep is it. I've got Phoenix BIOS.
I removed mouse (USB), speakers, and others but it's still beeping. I try to remove battery.

Yay, but it's no pause between beeps. There are the same, and they are very fast.
I think computer passed POST, because beeps are on "Starting Windows" screen.

Your computer is failing, obviously. Perhaps you can remove the drive and connect it to another computer to retrieve data. I hope you have been backing up regularly. Good luck.

I will try record it. Maybe tommorow.
@up. Yes, i have back up all of my files.
My notebook have guaranty, so maybe...?

Try replacing the keyboard. Sounds to me like windows thinks you have a stuck key. Save yourself some $$ and try it, first.

panais said:

PeaB4YouGo said:

Try replacing the keyboard. Sounds to me like windows thinks you have a stuck key. Save yourself some $$ and try it, first.

Acer 5740g is Laptop.

Okay...but you've never put a USB keyboard on a laptop? Just askin'.