"'Edit Document' requires a Windows SharePoint Services-compatible application and Microsoft Internet Explorer 6.0 or greater." - Problem Fixed

I had this problem for about a week when trying to edit documents from Sharepoint 2007. Indeed, the problem became so frustrating that I needed to fix it. The error I was getting was:

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Windows Internet Explorer
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'Edit Document' requires a Windows SharePoint Services-compatible application and Microsoft Internet Explorer 6.0 or greater.
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OK
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I came to this article:

http://support.microsoft.com/default.aspx/kb/833714 and followed the instructions:

1. Via Add/Remove Programs ->Office 2003 -> Change dialog, I removed and readded the Windows SharePoint Services Support component as per Method 2 in the article above.




2. I tried to re-register the OWSUPP.DLL (with an uninstall and reinstall with regsvr32 "C:\Program Files\Microsoft Office\OFFICE11\owssupp.dll") and just got an error:
   
   
   
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   RegSvr32
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   DllRegisterServer in OWSSUPP.DLL failed.
   Return code was: 0x80070716
   ---------------------------
   OK
   --------------------------
   


3. I also tried to re-register the Office 2007 copy of the dll:
   C:\Program Files\Microsoft Office\Office12\OWSSUPP.DLL




4. Curious, I also rab dependency walker http://www.dependencywalker.com/. I dragged owssupp.dll into dependency walker and it indicated that I had Dlls missing as per the screenshot. I downloaded these from the web e.g. http://www.driverskit.net/dll/link/2263.html and moved these "missing" files to the office 11 directory - but the problem still ocurred.
   
   
   
   
   


5. I finally gave up and bit the bullet and did a repair install of Office 2003 via Add/Remove Programs - (which didn’t require the install media and took about 10 mins) – and it all started working.

Aparrently, you may get this problem if various Windows XP service packs are installed or you uninstall any Visual Studio VSTO tools.