I have screwed up my wireless drivers and need help.

Plug in a cable, download Driver Booster and run that.

windows update doesnt find one? reboot then check win update and you might get lucky.

let me explain it to you, first of all, it's driver is most probably in there somewhere inside the system folders, they cannot be deleted permanently, i mean network and disk drivers. according to your windows version (xp/vista/7/8/8.1) you have to find your device manager, right click on your computer name and click on "Scan for hardware changes" then it'll probably automatically renew the driver for that particular device. you don't need connection for it, if you had it working once, that means it'll work always! if it doesn't work, try restarting your computer with "Safe Mode with Networking" option. You'll see it'll recognize your drivers in the same OS, just in safe mode and you cannot install a new driver there, so this is pointless but you should still try it.

Have you tried system restore? I think it may help you.

Had similar problem with my Toshiba Satellite Pro L500, after I reinstalled Win 7 Pro with a non OEM CD. Windows can't find the WLAN driver, but Linux does it fine :D
Toshiba has an extra support site where you can download all drivers for your laptop, so my guess is that Acer has the same. Use cable connection or save the driver on an USB stick and try it out.
Probably its this driver

Which distro of linux are you using?
If it's ubuntu i found the tutorial to get it working here http://ubuntuforums.org/showthread.php?t=874097

I have screwed up all my life!

Thanks for the help guys, I'm up and running now.

:D