HP ALM Manager Cannot Start "Main application process failed to start Contact your system administrator"

Our ALM system upgraded to ALM 12 and I tried to use new URL in Internet Explorer but...
error message:

I am using Windows 7 and finally I found a solution.

In Windows XP: it's "%USERPROFILE%\Local Settings\Application Data\HP ALM-Client"
In Windows 7: it's "%UserProfile%\AppData\Local\HP\ALM-Client"

Fix  
- Make sure that user has Write permission on the ALM client installation folder.
- Delete this folder
- Then close IE, then go to the IE icon in the start menu, right-click on the IE icon and select “run as administrator” from the menu.

In my Windows 7 environment, I go to C:\Users\{user}\AppData\Local\HP\ALM-Client

delete the recent generated folder and then launch IE as an administrator

It's back running again!

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