Hi 

I have a TP Link TL-WN722N adaptor; in the last few days, my internet speed on the PC has dropped dramatically. It is fine on my mobile and flatmate's laptop, so adaptor related issue.

The antenna is no longer able to be adjusted to different angles, as if no straightly connected it falls out. It seems like to wiring has come loose and the antenna will only attach when in one position. This connection is where the antenna clicks in the joint, where the direction of the antenna can be adjusted. 

See pics below.

Thanks Nick