>I have a new installation of SQL Server but it doesn't allow me to attach my databases. This one crashes everytime I am executing the attach procedure. As soon as I select the .mdf and click OK, it cannot proceed.
>
>I have this information:
>
>Problem signature:
> Problem Event Name: CLR20r3
> Problem Signature 01: Ssms.exe
> Problem Signature 02: 2011.110.3000.0
> Problem Signature 03: 5081c1cd
> Problem Signature 04: System.Data
> Problem Signature 05: 4.0.30319.33440
> Problem Signature 06: 520042f4
> Problem Signature 07: 229b
> Problem Signature 08: 5e
> Problem Signature 09: GYUG4OICIJCNPUDE04XUOOVLD11FB3JU
> OS Version: 6.3.9600.2.0.0.256.4
> Locale ID: 1033
> Additional Information 1: 86cb
> Additional Information 2: 86cb7c71184ac85157db7c0453ddb622
> Additional Information 3: b718
> Additional Information 4: b718c61c185d1d6b128ba875a8e7bbe1
>
>Read our privacy statement online:
> http://go.microsoft.com/fwlink/?linkid=280262
>
>If the online privacy statement is not available, please read our privacy statement offline:
> C:\WINDOWS\system32\en-US\erofflps.txt
>
>Anyone would know what this is all about?

Run SSMS as Administrator.
If default folder for MDFs is in c:\Program Files... you may have problems attaching them :-)