I had this problem too with my kid's Aspire One (Linux). It happened after I borrowed it to use at a PTA meeting, and the battery ran out on me. Thanks for the solution. It's all working now. Here are some detailed non-command line instruction for the same fix, for those of us who need it:
This is to find and delete the networking folder:
1. From the regular Aspire One options page, go to the Files panel
2. Click on the triangle to see more icons
3. Click on MyFiles, which opens a file manager
4. In the menu bar, select View->Hidden files, to show a tick in the box. (Sorry, I'm translating from a German display, so the option names may not be spot on.)You should be in the "My Disk:///" directory.
5. Find folder "gconf" and click on that
6. Find folder "system" and click on that
7. You should now see folder "networking" listed as one of the folders.
8. DELETE IT! (Right click on the networking folder, and select option delete.)
Okay, once you have recovered from the fear of deleting goodness-knows-what-file because you are just following some internet instructions, you have to re setup your wireless connection:
1. Shut down all those windows, and go back to the regular Aspire One options page.
2. Click "Settings" on the bottom right.
3. Click icon for "Netwrok Center". If this works, and a window pops up then it's going well.
4. Click on "New", and follow the on screen instructions to connect and re-setup your WLAN or LAN.
Oh, and do check that the little network switch near the bottom right of the keyboard is switched on. It should show an orange light.
Hope this helps