Running Powershell using administrator and server farm account

Running Powershell using administrator and server farm account

I am a newbie in Powershell and would like to know if running a powershell
command as administrator or service account is possible or not.
I tried running a Add-SPSolution -LiteralPath command as administrator and
using server farm account but I got this error: "Access denied.". I
checked the properties of SharePoint 2010 Management Shell and set the
advanced property to "Run as administrator". I tried running the command
both as administrator or as server farm account.