you need a new cmos battery. CR2302 or something like that, i can't exactly rememeber, but its written on it. take the old one out, goto where you can buy small batteries like watch batteries. the people there should have one. I know here in Australia, pharmacies usually stock them.
Can you go into the bios and save all your setting then reboot and see if it happens again. It is possible your cmos battery is bad. Does your time on your computer change when this happens. I know you said it has only been a month and your battery should not be bad but things can happen. You can also try to update your bios and see if that fixes the problem. Good luck..
Bad bios, bad chip, or bad battery. It's not that it only lasted a month, but if it hung around their factory for a long time who knows how old it is. They are cheap and easier to replace then the bios chip.
You could try flashing the bios if you'd like. Cheaper then a battery. Or just do what I do and don't turn off the machine;)