How to Repair Windows Installer Error 1607

Reinstall the InstallScript Engine and Register InstallScript Files
1. Reinstall the InstallScript engine from the official InstallShield Developer website (See Resources).
2. Allow time for the download to complete and the extract the 'ISScript7.zip' file from your desktop using a file extractor program like WinZip.
3. Double-click on the 'ISScript.msi' file and the InstallScript engine will automatically be reinstalled. Try to install the software that you received the error with again to see if the problem is resolved.
4. Register the Idriver and Msiexec files if you still receive the Error 1607 message. Click on the 'Start' button from your desktop and then click on the 'Run' option.
5. Enter ['C:\Program Files\Common Files\InstallShield\Driver\<version number>\Intel 32\IDriver.exe' /REGSERVER] without the brackets into the 'Open' field and then click on the 'OK' button.
6. Click on the 'Start' button again and then click on the 'Run' option. Enter [C:\Windows\System32\msiexec.exe /REGSERVER] without the brackets into the 'Open' field and then click on the 'OK' button.
7. Try to install the software again and test to see if the problem has been resolved.
Change Permission to Fix the Error
8. Click on the 'Start' button from the desktop of your computer and then click on the 'All Programs' option. Move your mouse over the 'Accessories' option and then click on the 'Windows Explorer' option.
9. Click on the 'Folder Options' button from the 'Tools' menu, and then click on the 'View' tab.
10. Click on the 'Show hidden files and folders' option and then click on the 'OK' button. Click on the 'C:' drive option and then click on the 'Windows' folder.
11. Right-click on the 'Installer' folder and then click on the 'Properties' option. Click on the 'Security' tab. Click on the 'System' option and click on the box next to the 'Full control' field so that it's selected. Click on the 'Administrators' option and then make sure the box next to the 'Full control' field is selected.
12. Click on your user name and then make sure the box next to the 'Full control' field is selected. Close out of the dialog boxes and you will have changed the permissions. Install the software you want and the error message should no longer appear.