SP1 changes computer to pre-release

After updating my computer last week to SP1 its now saying this is a pre-release.

This is the second time this has happened and I definitely am running the full version as downloaded from M$.

Anyone else had this? I have 1 day left to activate, a new key doesn't help and I can't find a hack.

Where does it say 'pre release'? When you right click Computer > Properties?

Here's a link to the final version which I burned to a DVD (both 32Bit and 64Bit) and it works correctly.

I think I fixed it, *fingers crossed*

I must have installed the beta SP1 a while ago and when the new version came out if triggered the pre-release warnings. I uninstalled the Service Pack and reinstalled and it seems fine... W7 version number was correct and the SP version didn't mention Beta so I luckily remembered what I did.