Windows 7 (Win 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?
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Previously x64 support was only for Windows Vista.
Also moving forward the LSS and ACS 7.X agents are backwards compatible with NS6.
Verify Symantec platform support - Symantec Management Platform and Solutions OS Support Matrix