You still didn't explain what you did, but it sounds like you meant the BIOS (there's no such thing as a "recovery menu", the PC ain't a PSP).

Taking out the CMOS battery (looks like a watch battery) will clear the CMOS (where BIOS settings are stored in).

I guess what you did was fiddle with some settings, and stopped the computer from booting up at all.


Next time, it would be nice if you could be more clear (I played with the BIOS settings, and now the computer won't boot up at all - as in, nothing comes up when you press the power button).
I thought you were talking about the Windows bootloader the whole time there.