I have just recently upgraded my computer and os to windows xp 64bit. i first started using explorer to surf until i went back to firefox due to its superiority. every other program i use the sound works, except for firefox when im trying to use flash. when installed i did not import windows explorer settings. i installed and uninstalled flash 3 times as well as firefox. i have the newest version of firefox. i have installed and uninstalled flash manuelly many times aswell. if it helps at all i have a realtek hd sound card. ive been through all the trouble shooting sites possible including third party sites and yours always putting settings back to the original state after the lack of success. firefox is stock and no settings have been changed, except for that i have adobe flash. == This happened == Every time Firefox opened == from the begining