Fatal Error During Installation Kaspersky Endpoint Security

How to fix Error 1603: A fatal error occurred during installation - Duration. How to install kaspersky endpoint security 10 1-10 arabic - Duration. Kaspersky Endpoint Security for Business fails to download or install. You may see the following errors: Error -1603. A fatal error occurred during.

I am trying to install Kaspersky Anti-Virus 2012 onto my Windows 7 laptop. At the end of step 3, there is a 'fatal error', and the installation stops and rolls back all the progress it made.
I made screencaps, for easy helping.
In the middle of installing.
Rolling back.
Fail.
And then it says this.
I downloaded the scanner thing, but it didn't show up. So I did some research, and I found that Norton can never be completely uninstalled. I had Norton previously. Kaspersky won't install if there So I got CCleaner (It has a pear as its logo) and used the reg cleaner tool. There /where/ some Norton-related things that it cleaned up, so I restarted and tried to install Kaspersky again. ...To no avail. The same thing happened.
I have tried to install Kaspersky multiple times, and this just keeps happening. It worked fine for my friend's computer; this is the program's second out of three possible installations. So I know there's nothing wrong with the program itself. The error messages tell me that my computer may be infected, but it runs fine, and CCleaner isn't picking up anything else.
Because I uninstalled Norton (and the useless McAfee) before trying to install Kaspersky. (I have the disc.) So my computer is unprotected. Help me.