New
#1
Click on "set a custom scaling level" and change it to say 125%. Click Apply, Sign Out, Sign back in. You should be able to change the Text Size.
Yes, this has been broken since the beginning of Previews. If you are comfortable working with regedit, go to:
HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics
and you can tweak the xxxFont entries. Just change the first hex byte - I use eb instead of the default f1. You'll need to sign out/sign in for it to take effect.
Looks as though the system may not be activated, therefore personalization is blocked.
Ok. I was talking generally and not necessarily directing it at you, but also the OP. It does have everything to do with it if a system is not activated. Just went through that due to losing activation. Once I got it activated this is no longer greyed out and indeed works as seen below. However, I see it's not the case with you.
Is yours a fresh installed system?
Attachment 32266