Fixing issue where SharePoint 2010 logs is 0 kb

This was an interesting issue I came across. All the SharePoint 2010 logs where 0 kb (commonly located at C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\LOGS). It was really hard searching for error messages for the issue I was trying to fix in the first place, so I had to fix this first.

Turned out to be the account that runs the service SharePoint 2010 Tracing (SPTraceV4) that didn't have the correct permissions. Someone had probably messed with the service accounts. Here is how to fix it on Windows Server 2008 R2:

1. Go to Start menu -> Administrative Tools -> Services
2. Right-click on the SharePoint 2010 Tracing service and then click Properties
   
3. Note the service account that runs the serivce under the tab Log On and then close the Properties window
   
4. Go to Start menu -> Right-click Computer -> Manage
5. Navigate to Configuration -> Local Users and Groups -> Groups
6. Locate the group Performance Log Users -> Right-click and then click Properties
   
7. Click Add... and the write or select the service account that you got in 3. and add it to the group
   
8. Close the Server Manager windows
9. Go back to the Services window and click Restart
   
10. When restarted the log files should start filling up again and you can start fixing other stuff ;)