DRIVER INSTALLATION FAILED 1603

Hello

Welcome to Microsoft Answers Forum!

To assist you better, please provide us more information.

a)    Are you able to install other programs without any error message?

I would suggest you to unregister and re-register windows installer and check whether it helps. To do so, please follow the steps below:

Unregister Windows Installer, and then reregister Windows Installer. To do this, follow these steps:
 
1. On the "Start" menu, click "Run:.
 
2. In the "Open" box, type "msiexec /unreg", and then press ENTER.
 
3. On the "Start" menu, click "Run".
 
4. In the "Open" box, type "msiexec /regserver", and then press ENTER.

For more information, please refer the link mentioned below:

http://support.microsoft.com/kb/555175

Also you can download and install latest version on windows installer from the link mentioned below:

http://www.microsoft.com/DownLoads/details.aspx?familyid=5A58B56F-60B6-4412-95B9-54D056D6F9F4&displaylang=en

After you finish all these steps then you can try installing VZAccess Manager Software and check this might fix your issue.

I hope this information helps. Please get back to us if you have any more questions about this issue.

Thanks and Regards
Mir - Microsoft Answers Support Engineer                                                               
Visit our http://social.answers.microsoft.com/Forums/en-US/answersfeedback/threads