WSUS Product Team Blog : New Product Category for ISA Firewall client:
How to obtain the version of Firewall Client for ISA Server (December
2006) that includes Windows Vista support:
Finally the ISA firewall client that will support Vista is out today and there’s a new WSUS category to boot!
This is a tad confusing because the page on the download site says “Public beta” but the KB article doesn’t say beta, nor does SeanDaniel.com….in the public ISA newsgroup it was posted that these are indeed final parts.