My experience was that the Add Printer window would reappear almost immediately with no error message at all.
I have found that Windows 8 has a lot of arbitrary changes that make things more difficult. For example, to change a wireless connection from Public to Private, you have to go through several screens to 'Forget' it and then reconnect. The option to rename a connection is completely removed. They are also doing an extremely poor job making sure things are compatible. This week they released an update to Excel & Word that causes an error in Windows Update. You have to download the update file and run it manually. Also, a change they made in November has broken Winhlp32.exe so old fashioned help files can no longer be used.