So my Acer Aspire One D250 is my little netbook for browsing the internet. I know it's a terrible old computer, but it's somewhat reliable. I really don't want to get rid of it, however the wireless just stopped working. The wireless slider on the front right of the computer won't re enable the wireless. The wireless symbol just appears on screen with a red x, and the slider returns to its original position. What's going on here and how can I fix it?