With some Windows 10 Insider build like 14328, when you perform the upgrade process, now each time you open your Visual Studio 2015 to access an ASPX file, the IDE gives you an error like
blah blah, see %APPDATA%\Microsoft\
if you open the ActivityLog.xml file the last line looks like
System.IO.FileNotFoundException: Could not load file or assembly 'stdole, Version=7.0.3300.0
The solution is to reregister “stdole.dll” into your GAC folder, one way to do so is via following command
gacutil.exe /i "C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\stdole.dll"