Windows could not update registry data in the installation.
I have searched online but I find nothing to assist.
The first error I got was a E: drive not big enough to do an upgrade.
So I decreased the size of C; drive by 100MB and then applied it to the E: drive.
I first defragmented both drives before sizing/desizing of C: and E: drive.
The E: drive is the "System Reserved" drive for Win 2008.
It used to be 100MB i changed it to 195MB.
I used Easus Partition Master.
I need to upgrade because I need to install new version of database that is only compatible withWin2012.
I can not do a Clean install because client machines register with application database running on this Win2008 machine.
All this is on a VMenvironment