Hello.  I have lost all sound on my HP Pavilion m8100n desktop.  It happened just after installing a D-Link DWA-552 N1 wireless adapter.  The adapter works, but I have no sound.  A diagnostic check tells me that my speakers are not plugged in.  They are, and everything is correctly installed.  I tried updating my Realtec driver, but that too has been unsuccessful.  I am also having trouble with my computer freezing up, losing control of both keyboard and mouse.  I am at my wits end, and have become almost obsessed with fixing this thing.  I have Windows Vista Home edition installed.  I would appreciate any and all help that you can give me.  Thanks in advance.  I bought the computer in September of last year.

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