Hi, I'm very new to Ubuntu, with limited command knowledge.

I've bought a brand new PC without an operating system, and have just installed Ubuntu 12.04.

All I've done so far is plug in the ASUS usb-n13 - I haven't installed any drivers or anything at all. Without me doing anything, it has picked up the local wifis around. I select mine, it tries to connect, but can't.

I pretty much have this exact problem, except that I haven't had or tried with any previous versions of Ubuntu, and I haven't tried installing anything yet:
http://ubuntuforums.org/showthread.php?t=2079949

I imagine that if it can already see the wifi network, that I don't need to install a driver?

I think I have RTL8192cu, as this name is mentioned in some of the directories in the Linux directory on the installation disk. I read the readme.txt on the installation disk, but it gives no instruction using Network Manager (other than it should just work? And I'm not even sure if this is what I'm using) and I'm not sure if I'm supposed to use the command-line method or not, because it says not to use it with Network Manager (which I'm assuming is what is currently picking up the available wifi networks).

Here is my lsusb:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 003: ID 0b05:17ab ASUSTek Computer, Inc.
Bus 002 Device 004: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth

Can someone please help me get this working!