I have Ubuntu 10.04 dual booted with Windows Vista on a work Lenovo R61 laptop. The home and work wireless connection were working fine. I lost all internet connection at work. The IT guy clearly knew nothing about Linux. Since he 'fixed' it, I get nothing, no WLAN signal the Network Manager icon was gone, no internet. I still have the live disc and if I run from the live disc the connections are there and everything works perfectly. How do I restore the internet easily on my laptop? I have been using Linux for 3 years but I am still a bit of a newbie, this is the first major problem I've had in three years. It's driving me nuts.