I just got an Edimax EW-7728In PCI card for my comp with Windows Vista Ultimate (having ultimate could be another possible reason for this problem). I installed everything easily but it says that the driver is unable to be found. The icon that appeared at the bottom left in the taskbar had a red "X" over it and it said "Not Exist". I checked to see if this was because I installed the actual card incorrectly, but the lights were on on it. If anyone has had this problem, please help! Thanks!