Win 7, 64 bit USB connection problems

I'm having real problems getting my Touch to reliably connect with my new Win 7, 64 bit Dell laptop. Dell tech support says the drivers and hardware are fine. Following the troubleshooting via Apple support hasn't solved the problem. The Touch times out and/or gives me -48, -6999 messages. Plus "required file cannot be found" messages. I've updated apple drivers, uninstalled/reinstalled iTunes.
Will I have better luck moving to Win 7 32 bit?

Not quite ... the chipset is an intermediate thing on the motherboard between the processor(s) and various parts of the other business:
http://en.wikipedia.org/wiki/Chipset
I found a reference at Notebookcheck saying that the 1557 had a PM55, which was sort of why I was thinking BIOS with your issue:
[REVIEW DELL STUDIO 1557 NOTEBOOK|http://www.notebookcheck.net/Review-Dell-Studio-1557-Notebook.23009.0. html]
... but configurations can differ for Dells (and other PCs) on these things even "inside" particular models (not just ranges of models). So I'm not 100% sure that your particular 1557 has the sorts of 5-series chipsets that I worry about when I see your error messages on a Windows 7 system.

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Win 7, 64 bit USB connection problems

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