Netgear WAB501 and blue screen

Hi,
i have the netgear WAB501 wireless adapter. With my notebook Acer
aspire it works for a few month, but yesterday, i've turned the
computer on, it showed me the blue screen and starts only if i unplug
the card. when i uninstall the software for the card, the computer
starts even when the card is pluged in. The blue screen show me the
Adresses of the error but not the program that failed. 0x00000007e ...
have anyone a solution for me? thank you.
best regards.
Torsten