Unblocking a DLL on a company machine. How?

Question

I am trying to test out MVVMLight but the DLLs that come with it are BLOCKED. I have read about it and I am told to click the UNBLOCK in the file property.. but that doesnt exist for me.. Then I found out of a program called STREAMS that is suppose to unblock.. that didnt work... any other idea how to fix this?

Error 7

Could not load the assembly file:///C:\MIX10-MVVM-Samples\Mix10.MvvmDemo2 - End\Mix10.MvvmDemo2\Bin\Debug\GalaSoft.MvvmLight.Extras.SL4.dll

. This assembly may have been downloaded from the Web. If an assembly has been downloaded from the Web, it is flagged by Windows as being a Web file, even if it resides on the local computer. This may prevent it from being used in your project. You can change this designation by changing the file properties. Only unblock assemblies that you trust. See http://go.microsoft.com/fwlink/?LinkId=179545 for more information. Mix10.MvvmDemo2

Answer 1

The file contains an alternate data stream that indicates that the content was retrieved from the Internet and is not secure. This is a feature of the NTFS file system, one that's unfortunately well hidden because Explorer has no support for showing their content. You can see them from the command prompt with the DIR /R command option. And type their content with TYPE filename:streamname. And delete them with DELETE filename:streamname

Other tricks is to copy the file to a file system that doesn't support alternate data streams, that slices them off the file. A flash drive for example. Or a zip utility.

Later versions of Windows, I think starting with Win7, has built-in support for this in Explorer. Right-click the file, Properties and click "Unblock".