Go to System in Control Panel and click on Change Product key and see if you can enter it again. If not, looks like a fresh install is in order.
Hello lightstar. Appreciate help (been off line awhile (sad) ctrl panel not have this (or similar) option. I haven't entered product key. the four choices that come up include typing in the p key, but when I chose that option - system does nothing.
related question: my windows is on the c drive. most other things are on a separate (D:) physical drive. If I get a new system - how easy/dif is it to move the d drive to the new pc, I mean related to the programs / steam etc working on new PC with dif windows? Toms hardware doesn't have info on this.