Windows 7 is a verified platform of the current releases of ACS 6.1 and LSS 6.2.
Question: Were ACS 6.1 and LSS 6.2 tested and are expected to work on Windows 7?
Yes Windows 7 is supported.
Additionally for ACS X64 support was added last November for
- Windows 2003 (& R2)
- Windows 2008 (& R2)
- Windows 7
Previously x64 support was only for Windows Vista.
Also moving forward the LSS and ACS 7.X agents are backwards compatible with NS6.