The network has Windows 7 Build 7201

According to some information (wzor.info) - this build is IDX (RC2). According to reviews, it has become somewhat faster than previous builds. The remaining changes are set.

Windows 7 build 7201 ( x86 );
Windows 7 build 7201 ( x64 ).

Updated.
In the morning, perhaps, there will be a Russian pack in the Windows Update system, but for now - unofficial ones:
')
RU LP ( x86 );
RU LP ( x64 ).