Recently purchased a PNY Attache Optima Pro 4gb flash drive with Ready Boost. Works fine on a desktop with XP MCE and one with XP SP2 but crashes my laptop with Vista and my other desktop with MCE. Seemed like a good price ($30 locally) for a drive that will not have critical data of any sort on it but any ideas on how to make it work or should I return it and try something else? Any known issues with these things, PNY's site doesn't have much info? Other USB devices work fine by the way.