When I was trying to deploy the SharePoint 2010 Web Part on a server using PowerShell, I got this error when I tried to run the Install -SPSolution command saying that:

Install-SPSolution: Admin SVC must be running in order to create deployment timer job

So all I needed to do was to go to the Services and look for the service called SharePoint 2010 Administration. It woill not be running so I switched it to Automatic and then started it. Then I was able to re-run my Installation script!