Hi,
I have installed SQL server 2008 R2 in windows 8 64 bit machine and it was working fine. 2 days back i upgrade the OS to windows 8.1 and the process went smooth. Now when i start the SQL server, I couldn't able to login.
When I checked the service, i wonder that there are no SQL server 2008 instance running the services list.
Regards, Anbu.