I purchased several of these cards recently and became very disappointed. Several attempts with three identical cards on several different IMB Thinkpad T22 laptops produced the same results. Placing the cards in the machines resulted in the machines suddenly shutting down. Several calls to Linksys culminated in their admitting that these cards do not function on Win 2000 machines that have the second service pack installed. Prospective buyers should be wary of Linksys tech support. I was forced to make several phone calls before I was able to speak to a competent individual. A single example of the incompetence I dealt with was a second level technician who told me in no uncertain terms that a one-gigahertz P3 was not a powerful enough processor to run their product. Perhaps my experience is isolated, however, I will be taking my business somewhere else.