I bought the machine with the Lenovo brand is the VISTA system, why is the system for Vista …

next wireshark packet to see if the transmission problem.it will not, I like you, not Yuzhuo These problems! There are many reasons for the dropped, the network could be set up, it may be defective system itself, or your cat and broadband service providers that have the problem of poor recent may be said that …your telecommunication company and the ventilation …Are you referring to the old Internet dropped it? If you should be on the card are not equipped well.VIAST network card driver and the XP is not the same.To find the proposed re-installed XP drivers to see you.The system is not possible.Not May be due to VISTA and XP problems.This issue and not related to the operating system to check the network card driver.You probably drive, the machine was originally installed vista, the hardware inside is the vista for the design, as for xp, motherboard and network card driver may not xp compatible dropped as a result of the emergence of the problem.suggest that you can think of the site to see if there is no such explanation.
wish you good luck.