Hi, Recently (not sure if it was immediately after El Capitan upgrade or not), my mobile USB dongle stopped working. I have tried re-installing it and nothing. Now, every time I try to install it it prompts an error like: Software not installed. "There is nothing to install to..." I have bought a brand new dongle and I get the same error. Dongle is HUAWEY. I guess I need to complete uninstall the dongles's software/drivers etc. But how do I do that? I have deleted the 3-COM 3.5G application from the application folder but it didn't help. I am sure there are other files spread around other system folder. Can anyone help how to wipeout all remaining components from this installation, so that I can install it again? Thank you in advance joni ps- the drivers of these dongles are very tricky. I remember that I have installed generation 1 of the dongle in my daughters MBP. Then we bought the second generation of the dongle and we failed to installed on her MBP. The software of the new dongle would not install at all on top of the other installation. So I really need to learn how to completely remove the installation so that I can solve all these problems on various machines.