Hi Gents, I have a windows 7 laptop and the battery does not work anymore, I would like to install Widows 8.1 to my laptop, Is it ok or not ? Thanks.
your failed battery will not affect installation and functionality of Windows 8, it would only mean that you can't run it unplugged.
Shouldn't change anything. Usually the CMOS cell isn't even used as long as there is mains or (in the Laptop case) battery power.
just get a new cmos battery, few bucks, otherwise it will not hold time, settings .. too much aggravation for what it worth.