As per Netsight release notes 6.2.0.221....
Windows 64-bit (qualified on the English version of the operating systems)
- Windows ServerĀ® 2003 w/ Service Pack 2
- Windows ServerĀ® 2008 Enterprise and 2008 R2
- Windows ServerĀ® 2012 and 2012 R2
- WindowsĀ® 7
- WindowsĀ® 8 and 8.1
-Ron