Wireless Driver Enable And Disable Itself

since i while ago my laptop's wireless been behaving really weird. the wireless driver will suddenly disable and gone from the network list going into Device manager, it says "this driver is not installed " or sth like that. cant exactly rmb what it said, and sometimes the wireless bars in the bottom will show a yellow "!" with no connectivity with showing only the network i connected to. if i repair it the driver will be gone. almost have to repair like 10X times to get it come back on, (or i think i came back on itself) or sometimes just no network "no connections are available" 1st thought was virus, but did full scan.no virus. just did a Full Format and reinstall window, and 1st thing i've installed the wireless driver..still happaning.