AddToGameExplorer 0x80004005 System.Runtime.InteropServices.COMException
(0x80004005) unspecifed error at PatchWrapper.CPatcherClass.AbortPatch()
This error generally means that LOTRO failed to make a shortcut in the 'Games' menu in Vista.
You can always make a LOTRO shortcut manually by going to the main LOTRO folder in your Turbine directory and launch the turbineinvoker.exe
If you are still receiving this error message, please make sure that you have .Net Framework 1.1 and .Net Framework 1.1 Service Pack 1 installed on your computer.
Did you download and install the game from Steam?
You may have downloaded and installed a second version of the .Net Framework. Follow the steps below in order to look for and remove duplicate versions of .Net 1.1 and its Hotfix.
To reinstall .Net and its SP, start by clicking on the Windows "Start" button > "Control Panel". In the control panel, click on either "Add or Remove Programs" or "Uninstall a Program". Look in the list that comes up for:
"Microsoft .Net Framework 1.1
"Microsoft .Net Framework 1.1 Hotfix (KB####)"
You may see one or both listed. Either way, uninstall them and reboot your pc once they are removed.
Once rebooted, redownload and reinstall them via the downloads at the link below:
If you need additional assistance, please contact Turbine Technical Support.