Hey Alan and Peter,I have checked MS Magnifier in Windows 7 and 8 and they are the same but can read 'lens' magnifier in Windows 8 if you read in 'black' than Windows 7.
I think the best way to have a better video card to read with MS Magnifier in Windows 7 and 8 and will check with my HP Desktop PC with W7 soon.
take care. peter.