Changes

I tried to build based on the same .mozconfig file, but the first error I got was related to SDK. I needed to upgrade SDK version based on these [https://developer.mozilla.org/En/Windows_SDK_versions recommendations] to SDK 7, and the .Net Framework to 4. Also I needed to change the SDK version in the SDK configuration tool to 7.1.

At the end, the build was successfully done after 2 hours on Win 7 and more than 4 hours on Vista!

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