I also have an Acer4720Z. I bought the recovery disc's and they don't put the drivers on them. I called, they said to d/l off the website. I tried, didn't work. I download a copy of Black XP, put it on, then went to website and now it works. Acer won't give you the VistA DRIVERS BUT DO GIVE YOU THE xp ONES. tHAT SUCKS. tHE DISC'S SAY THEY'LL RETURN IT TO FACTORY CONDITION, BUT THEY DON'T. wHAT A RIP-OFF!! aCER, gATEWAY AND E-mACHINE ARE ALL MADE BY THE SAME PEOPLE. i'D RECOMMEND not BUYING ANYTHING FROM THEM.