I started my Windows 10 beta with the Enterprise version. How would I downgrade to the pro version?

Most of the time the DHCP is fine, but on occasion I need to use a static IP. Suddenly after build 10049 loaded, I cannot.
Ideas?

Yes I am logged in as administrator. btw, it was fine in build...

thanks. That was it. Enterprise key.

no dice.

it says:
That key cant be used to activate this edition of Windows. Please try a different key.

The activation key from the previous build now shows as needing activation again.
I tried, and it fails.
Do I need a new key and where can I get it?

I thought i had this licked. Still no dice. If any part of MS prodcts come up as not yet activated, I had a theory that this was causing it when the app tries to phone home. cured those ills, and...

No dice.

The cursor alternates very rapidly between a regular edit cursor | and the WIndows small blue circle. Plus the sporadic delay of the keyboard buffer.

It's as if Win10 is refreshing...

When creating a new email, editing document, the cursor blinks so fast as if someone is pressing the f5 refresh key repeatedly.

Another issue is lag time in typing. Even typing this new post, The...