You say you deleted the program - did you uninstall it ? if not, click Control panel, click Uninstall a program - if you see it listed, right click it and uninstall.
Do the drivers
show up as being properly installed in Device Manager ?
Click start orb, control panel, classic view ,double click device manager.
Click the + next to your wifi device then right click the device in question and check it is listed as working also look under the drivers tab.
Suggest you visit the manufacturer 's website to see if there are new drivers to install.