BIOS messed up

[User200015]

I have messed up with BIOS, and now pc wont boot, it's stuck at "starting windwos", disconnecting the CMOS battery is not helping, what to do? is my comptuer done?

[Geek-9pm]

Not always hopeless. You need to tell what your did.
First give the name and model of the motherboard, if possible.
Then please tell if this is a home-built, a ready made desktop or laptop.
Without the details, it is hard to give a correct answer.
But what you describe does not sound like a full BIOS disaster, just a incorrect setting. Maybe. It's in the details. 

[Allan]

EXACTLY what did you do?

[foxidrive]

I have messed up with BIOS, and now pc wont boot, it's stuck at "starting windwos", disconnecting the CMOS battery is not helping, what to do? is my comptuer done?

The only BIOS setting I can think of that will allow Windows to start booting and stop, is if the hard drive setting was changed to or from AHCI

Windows is installed with AHCI either enabled or disabled (other choices can be RAID and PATA/IDE etc) and if you toggle this setting then the drivers won't do the right thing as it starts up, and it will stall.

https://en.wikipedia.org/wiki/Advanced_Host_Controller_Interface

Just change it back to IDE or put it back to AHCI etc if that is the cause - it will not have damaged anything .