Need multiple versions of the Windows SDK?

Question

I was just looking at installed programs to free up space, and noticed that there are two versions of the Windows SDK and the ASP.NET SDK. Are these 32 bit and 64 bit? The package name does not indicate that it is, so I wonder if both versions of these packages are needed?

As you can see in the image, Windows SDK 10.1.10586.15 and Windows SDK 10.0.26624 , and ASP.NET RC1 Update 1 1.0.20204.0 and ASP.NET RC1 Update 1 10.0.11123.0 . Since both packages were installed on the same date, I assume that they are 32-bit and 64-bit, but I would also assume that they would be called so if that were the case.

These packages are used to develop Windows 10 Universal applications in Visual Studio 2015.

Answer 1

I am posting as an answer here from @ magicandre1981's comments above, so I can close the question.

The Windows SDK 10.0.26624 is the SDK for the first build of 10240 since the summer of 2015.

The Windows SDK 10.1.10586.15 is the SDK for updating November 15, 2015.

As a result, I uninstalled both versions and allowed Visual Studio to install the necessary package to run my project, which ended with version 10.0.26624.

Answer 2

Just in case, if this helps anyone, it seems that newer versions of the Windows SDK installer will remove previous versions correctly, but somehow will not remove their entries from the Add or Remove Programs list. In my case, I had 7 entries. I sorted them by installation date and started deleting one at a time, starting with the oldest. For each entry, I just received the following error message:

I continued to delete them until I had only the latest version. Uninstalling this brings up the correct installer window instead of this error message, after which you can cancel the uninstall process.