I installed SQL Server 2008 R2 Expess
with an instance name SQLX08
, then I installed SQL Server 2012 Expess
with an instance name SQLX12
.
Now in the SQL Server Configuration Manager
I see, along with these 2 instances, another instance named SQLEXPRESS
is running which I didn't install. It's version shows 10.0.5500.0. That means it's an SQL Server 2008
instance, not an R2
one.
When I open the 2008 R2 SSMSE
, this SQLEXPRESS
instance doesn't show up in the Server Name
dropdown list, but it does in the 2012 SSMSE
.
Can anyone tell how, when and why this instance got installed?