Launching VB6 Editor after installing Visual Studio 2013 results in "Please wait while Windows configures Microsoft Visual Studio..."

Question

I have had various versions of Visual Studio installed beside Visual Basic 6.0 Enterprise for some time with no problems, most recently Visual Studio 2012 Premium.
I recently installed Visual Studio 2013 Premium, and now every time I open VB6 I get a dialog that says "Please wait while Windows configures Microsoft Visual Studio Professional 2013" that shows a progress bar. After it finishes (30 seconds or
so), it launches again and again and finally VB6 will open. This happens with each instance of VB6, regardless if I've already done it once and never run VS2013 in between.
If I cancel the dialog, I get this error message in a dialog: "Error 1712. One or more of the files required to restore your computer to its previous state could not be found. Restoration will not be possible." Several more "Please wait"...
dialogs will appear and if I continue to cancel, eventually I'll get the VB6 editor. It appear to work fine despite the error messages.
It seems to me that the VS2013 installer flagged some dll's or other files to be rolled back whenever starting VB6. It doesn't appear to be necessary, and I'd like to avoid playing the "Please wait" wack-a-cancel-button game before launching each
instance of VB6 (or waiting several minutes for no reason). So how do I fix this?
Note: I've seen something similar happen in Outlook on a different PC when upgrading from 2010 to 2013. The same sort of "Please wait"... dialog would appear each time I opened Outlook. Judging by the "similar" questions that popped up when
entering this forum post, I'd say this is a general problem with upgrading older versions or installing newer versions of major Microsoft software side-by-side.
/* Don Reynolds */

Answer 1

I found the answer!
I was having the exact same issue, and I was search for a solution and I happened across the following thread: http://social.msdn.microsoft.com/Forums/en-US/f4b0fd38-f4f9-41ea-bd8d-834203a175d2/building-visual-studio-2010-project-triggers-please-wait-while-windows-configures-visual-studio?forum=vssetup&prof=required
Scroll a small bit down, and there is a post by Barry Wang explaining that you need to use event viewer to find out what is missing. Anyway, I opened event viewer, then open VS 6, then hit refresh in the event viewer (under Windows Logs -> Application)
and saw a warning message from MsiInstaller. It gave me the following message:
Detection of product '{9C593464-7F2F-37B3-89F8-7E894E3B09EA}', feature 'Visual_Studio_Professional_x86_enu', component '{E3FF99AA-78B9-4A06-8A74-869E9F65E1FE}' failed.  The resource 'C:\WINDOWS\Microsoft.NET\Framework\URTInstallPath_GAC\' does
not exist.
I opened an elevated command prompt, I navigated to the C:\WINDOWS\Microsoft.NET\Framework folder and verified that 'URTInstallPath_GAC' didn't exist, and then I did "md URTInstallPath_GAC".
Closed and reopened VS 6, and it instantly opened - no "Please wait" message.
Now this may or may not be the same problem you are having (problem is - I have had it happen on two separate computers now with VS 6 and VS 2013 installed), but it should point you in the right direction. In fact, you should be able to use the Event Viewer
for anytime the "Please wait" message shows up for any application, and then once there find out what is really missing.