SQLServer Could not open error log file ''. Operating system error = 3(The system cannot find the path specified.).

Problem

SQLServer fail on service start. Checking Windows Event Viewer you see Could not open error log file ''. Operating system error = 3

Cause

This is a problem related with user permissions. SQLServer does not has permissions in some folder.

Solution

Go to Services, select SQL Servers service, go to properties and finally Log On tab. In thid tab, check Log on as Local System account.