unplugging

The hardware disconnect sound keeps randomly playing after I plugged a USB hub into my pc. I tried changing the power savings settings but they didn't work.

hi so my friend just recently built a pc and he didn't use his stock fan from his processor which is a xeon e3 1241 v3 , and he told me i could use it, so im wondering if it would work with my AMD athlon x4 860k. i need a new fan because my stock fan for my athlon broke, also i dont want to go...