I received my R3 a few days ago and am wondering something about the BIOS POST.  

I get one beep towards the end of the bios check (blue line), it then goes into booting Windows 7. Is this normal ? 

Also, I am having hard freezes at random times while using the PC. It completely locks up, no BSOD.  Only way to to reboot it is to hold the power down till it shuts off.

The manual says one beep is "Possible motherboard failure — BIOS ROM checksum failure" If thats the case, wouldn't it NOT boot into windows ?

I'd appreciate some help, thanks.