I have just bought a Dell Vostro 200 to replace my ageing Novatech machine.
I have a Buffalo G54 Air Station wireless Broadband Router serving various pc's around the house using Buffalo USB adaptors.
All have worked relatively well although signal strength has varied and I have used USB extension cables to get a stronger signal in some rooms.
The new Dell Vostro doesn't seem to want to recognise the USB adaptor when used with an extension cable and only picks up the wi-fi signal when the adaptor is plugged direct into the machine and only in the same room as the router (not very convenient as its now my daughter's bedroom). The machine will, however, pick up unsecured links to neighbours systems.
It would be worth seeing if a different wireless channel helps with sensitivity, and it is always said that PCI wireless adaptors are more sensitive than USB. I have added an extension antenna to mine with good results
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