>After I reinstall SQL Server 2012, with SSMS, I cannot attach database as it crashes as soon as I select the .mdf for the attachment. All the rest works ok on SSMS. I can query and so on. But, I cannot bring back two related databases in that environment.
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>Before the reinstall, it worked.
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>So, I repair the installation and it was successful. However, this problem remains.
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>Anyone has an idea on how to resovel that?

Also, I assume you run SSMS as Admin before attempting to attach, right?