I have purchased SQL Server 2014 License.
It was in evaluation period and it was working fine, but after completion of evaluation period I entered my license key into it (upgrade option), by keeping the same Instance, It has came back to normal i.e. I can now login with SSMS but problem like Deadlock started to occur.
I don't have much server load only 100 users, Settings are unchanged as it was before.
Why this is happening?
Shall I re-install the whole package?