/qb /quiet /norestart /S worked for me. I'm using Altiris to deploy. It installs and then needs some tweaking in the registry to turn off EULA
EulaAcceptedVersion is set to 3 according to your registry but for Windows 7 64bit it should be 4.
I'm with windows 7 x64 SP1, and the eulaAcceptedVersion is still 3 for me.
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