My laptop keeps making the USB connect and then disconnect noise. It appears to start after I move the laptop or even step heavily near the laptop, and after it starts it will keep making it every 5-10 seconds until I restart the computer or wait for a long time (an hour or more). I have tried everything I can think of in software and looked at questions related to this one and nothing has worked. I haven't plugged anything into the USB ports for at least 2 weeks now. The other symptom is that the built in webcam stopped working around the time this started (about a month ago), I am not sure if it was before or after.
I have tried:
Looking through the windows event monitor and didn't find anything
Changed the power settings to tell windows to not power off the usb ports
Checked the device manager where everything seems fine until the noise starts and then it refreshes itself every time the noise happens.
Went through the running processes and services
Ran a virus scan and CCleaner
Updated from SP1 to SP2 and installed all important updates
Every minute or so the balloon saying this device can perform faster pops up.
The computer seems to be using a lot more memory, especially svchost.exe -k /netsvc which used to be around 70-80 MB and now runs at around 110-120 MB (I got a virus about 6 months ago and tracked memory usage for tasks is how I know this :-P)