CorelDraw Installation Unsuccessful (Error 38)

Greetings, everyone!
I am installing CorelDraw on my Windows Vista laptop.
I have used an uninstaller program to check my drive if there are remaining files from previous installations (somebody else used this laptop before).
It came up empty, but something is blocking the Corel installation.
Has anybody an idea what's wrong here?
Thank you.

Product installation unsuccessful, please reinstall (Error 38).
