Winmsfw.exe: Anyone seen it recently?

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Found on a clients PC... NOD32 was installed and missed it. I
eventually found it with Hijack This and removed it manuallyand with
Prevx. The only apps I found that would even detect it were Prevx and
Trojan Hunter. Now, the problem is, if as Prevx say, it is over a year
old, why is it a fully updated NOD32 missed it, not to mention Trojan
Hunter(found it, but would not remove it), online Trend, Panda,
Spybot? BTW, the client was notified by their ISP, who had received
complaints from other users.

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