So I tried those four steps.

When I reconnected USB I got the same response as last time. As soon as I plug in the PC says "installing driver software." After a minute it says, "driver failed to install. Click here for detail." As always it offers me the trouble shooting option which doesn't work.

After I reinstalled your driver link I got this text report just like the three time before. Does it mean anything?

"This packet contains the drivers of ADB, Diag, Modem, NMEA, Rndis and ADB tools.
ADB is Android Debug Bridge. If you want to usb ADB, MAKE SURE
Settings->Applications->Development->USB debugging is ENABLE on ZPhone.

Following is the driver Path, choose the apropriate drivers according to Windows version.

ZTEUSBHostDriver5.2066.1.6-signed
----32bit
----VISTA for Windows Vista 32bit
----WIN7 for Windows 7 32bit
----WNET for Windows XP and Windows 2K 32bit
----64bit
----VISTA for Windows Vista 64bit
----WIN7 for Windows 7 64bit
----WNET for Windows XP and Windows 2K 32bit
----tools
----ADBinstall.bat double click it to run ADB install program
----ADBunistall.bat double click it to run ADB uninstall program"