I have an M18x R2 I bought refurbished from Dell about 3 months ago and the last 2 months I have had alot of problems getting hooked up to my wifi at home. I have replaced the router 3 times with different one and the same things happens after using if for a couple of weeks, and I have 2 ipads and 2 iphones that hook up to the same routers with no problems, could my wireless card be bad ?? I am pretty basic on my knowledge so please help......