By an accident i uninstalled my Connect manager (ZTE). but when i re-install it the virtual CD drive is detected but it does not detect the drivers. When i direct to the folder containing the relevant drivers(.sys files) still it doesnt detect.

Then i tried a modem of a different brand Huawei the same problem presists As i understand it is not a device(brand) driver specific issue as it does not detect modem(dongles) of any brand. when i plugged in a different USB device(a pen drive) the driver is detected and it works perfectly.

Please help me with the issue i have tried system restore but it doesnt work. I want a repair that works without re-installing windows

[Edit] I tried Karan's suggested method with usboblivion it didnt work. now im sure that the issue does not deal with the registry