If you read what dbrasher has said (about how your PC stores time) and what I said previously (about how your GPS aquires signals from the satellites) I think you will see that you may be sending the wrong time to your StreetFinder and that any of these time offsets could easily explain your slow aquisition symtoms.

But I have my clock and timezone set correctly. If I need to deliberately mis-set my clock and/or timezone in order to make it work, that's fine, but then exactly how should I do that?