You can still download older versions, including Visual Studio 2010, if you have an active Visual Studio (MSDN) Subscription Dev Essentials: Some older resources may be accessible through a free Visual Studio Dev Essentials
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If you don't have a paid subscription, you can join the Visual Studio Dev Essentials program for free. While the Ultimate edition is rarely included in the free tier, you can often find Visual Studio 2010 Service Pack 1 and other associated tools there. You can still download older versions, including Visual