Hi first time poster. I have just bought a refurbished ACER AO531 10.1IN NETBOOK from the argos clearance site on eBay. It arrived yesterday but regret to say that when I plugged the charger in I didn't get any charging led. Contacted the company that carry out the refurb and they were very apologetic saying it was almost certainly a faulty charger. They have arranged DHL collection and replacement. The machine wouldn't power up so I am assuming the battery didn't have any charge before delivery. Fortunately although frustrating it isn't my main machine but was bought primarily to control my model railway and be used when on holiday. In the meantime I have been reading through various posts here and elsewhere and have a couple of questions, on the assumption that when the new charger arrives everything will be OK. Firstly, seen a lot of comments about people not realizing they need to back up the OS. As there isn't an CD/DVD drive and I don't have an external drive can this be done to an external usb hard drive? I believe that Windows 7 (installed) has that option but not sure. I assume there is a recovery partition on the hdd but my own experience of these on at least 3 other machines isn't very encouraging as so far I have never been able to complete a successful recovery and have always had to revert to some form of disc. Secondly, prior to realising that the charger wasn't working I thought I would switch the wirless lan on. Found the switch on the front but unlike my main Toshiba it didn't seem to click across just worked like a sliding switch. Can't test until I get the machine working but is this correct or should it lock? Also, is there an option to enable wireless in software. Thanks