Will TT'25 work on a non_UEFI PC that was upgraded to WIN11?

Will TT'25 work on a non_UEFI PC that was upgraded to WIN11?  There are a number of ways to install WIN11 on a non-WIN11 compliant computer.  Will TT'25 work on these older systems that have been upgraded to WIN11?  I don't want to waste my time and money on Intuit and TT'25 if it will not work on an older computer that has been upgraded to WIN11.