USB device malfunctioning

[Guest ah]

I am running Windows XP Pro SP2.

 

I have the message: USB device malfunctioning but when I click on the

message, the window that opens is always empty, except once where I had USB

root hub (2 ports):unknown USB device and unused port. I keep hearing the

sound of an USB device connecting-disconnecting.

 

My laptop keeps trying to connect to WiFi, sometimes I have the message: no

network available (but my other laptop can connect), sometimes it connects,

but not for long.

 

This problem could be linked to Activesync. When I put my laptop on, I have

an Activesync message: cannot connect to the com port. If I reconnect, the

PPC is recognized by the machine but then I can't connect PPC and laptop via

BlueTooth anymore. So I disconnected the serial port from Activesync.

 

In the device manager all the ports seem to be functioning well.

 

I tried to restore my system but all the restore points have been wiped

out.

 

Could it be a problem connected to my printer. When I connect my printer to

either of the USB ports, 2 devices appear when I click on the USB icon: the

printer itself and a disk H? But may be this is normal. What is this disk

H?

 

Thank you in advance for your help.

 

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ah