Hi, and many thanks for your info in your FIRST post !
Stuff of dreams for us !
But, you have not specified if you have an XP Home or Pro or Media Centre. (The latter two are actually both 'Pro'.)
There may be a problem with the shared network, especially if the OS is XP Home... I've got a KB document on SP3 floating around here someplace but can't find it right now ! Have a browse around the Microshaft site as the 'problem' is hardly unique...
No big deal, if I recall correctly... Just more amusing re-configs !
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Ooooops.. Just re-read your post and it sounds more and more that it may be a Limewire problem... But, WHY, if you only did the SP3 update AND Frostwire was unaffected ???
Have a look at the various Limewire problem-solving links in my signature below...
Of course, there is a tasty morsel of logic behind the idea of just continuing with Frostwire and perhaps trying Phex as well, hmmm ?