Jen - -
Thanks for your reply.
I'm currently on Windows 8.1. I have installed later versions, per the Sony VAIO web site.
You are referring me to Windows 7 versions of these files.
Actually, the primary problem is that the battery will not charge fully. It is my understanding that this is due to the Battery Care Function being enabled, and that disabling this function will restore full charging. I can't disable the Battery Care Function if it's not represented in the VAIO Control Center.
What do you recommend for Windows 8.1 ?
- - Herb