Today I went to update the SharePoint servers with the April 2012 Cumulative Update. It was taken down previously because of an error in the update but it was recently put back up. I, of course, tested them first on our test servers and everything went smoothly. The Cumulative Update installed smoothly but when I went to use the SharePoint Products and Configuration Wizard, the update failed with this error: Task upgrade has failed with a PostSetupConfigurationTaskException An exception of type Microsoft.SharePoint.PostSetupConfiguration.PostSetupConfigurationTaskException was thrown. Additional exception information: Failed to upgrade SharePoint Products.
I did some research and saw this post: http://wingleungchan.blogspot.com/2011/11/postsetupconfigurationtaskexception.html
It was saying to run the wizard as administrator. I did that and the steps seemed a bit different but I just went through with it. I ensured to say that I wanted the server to stay connected to the farm, host central admin, etc. the install was successful! It took me to Central Admin and was asking me to configure the new farm! What?! Well, after a mini heart attack, I double checked the sites and went back to the main central admin screen. Phew! Everything was good – since it was using the same configuration database, etc. I think by running it as administrator, it thought I was adding a new server to the farm so it redirects to that page.