usb modem not working windows 8 (SOLVED)

I have windows 8 RTM( Enterprise Edition ) running on Dell inspiron Laptop with Micromax MMX 300G.

well all versions of Micromax MMX modem will work fine.
Just follow the steps below:

1. uninstall the software if already installed.

2. open the modem in new windows and set its
(modem_installation.exe and show_modem.exe ) compatibility to windows7 then   press OK.

3. Now install the software , then restart the system .

4. Connect the modem and start the software
 ( it shows no device ) then exit the application from the task manager .

5. Open the Device manager ( control panel > Administrative tools > Computer management )

6. Go for Other devices , simply uninstall all the drivers related to modem there (better uninstall both with or without yellow mark)

7. Go to Action menu and click on Scan for hardware changes .

8. Now simply open the MMX usb manager and it works fine.

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