Error: The Windows SharePoint Services Timer service is NOT started!

I was trying to install the Web part from Codeplex called SharePoint Access Checker Web Part on my Windows Server 2008 running MOSS 2007. I kept getting the following error when I would run setup.exe:

The Windows SharePoint Services Timer service is NOT started!

The service had actually started and was running just fine….thank you very much. I tried various solutions but nothing worked. The account that I was logged in was a domain account and was a member of the Site Collection Administrators. In addition,  this domain account was also a member of the farm administrators group and local administrators group. It was also the account under which the Timer service was running.

Just to test, I changed the account used by the Timer service to the local Administrator account but that didn’t help so I switched it back to the domain account. Finally, I decided to run the setup.exe file as administrator (right-click, Run as administrator) and it did the trick.