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Yesterday I installed .Net Framework 4 as it was required by Liquid XML Studio, but just after installing it, My SQL Server Management Studio stopped working. As soon as open the IDE I get

package microsoft sql management studio package failed to load

I tried pretty much all the solution posted on the internet but could not get it working, today when I removed the .Net Framework 4, SQL server management studio started working again.

Then just to test, I installed the .Net Framework 4 back ... and I started getting the same problem in management studio.

I want both on my machine ! how can i do it ?

PS : OS is Windows 7

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Seems like it was looking for the following registry key and not finding it.

HKEY_CURRENT_USER\Software\Microsoft\Microsoft SQL Server\100\Tools

You might have a look at more about Solution for “Package ‘Microsoft SQL Management Studio Package’ failed to load”

Hope this helps

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