PDFCreator already exist error

I am using PDFCreator with NAV. On one computer I removed PDFCreator and tried to reinstall because of some issues. But it wont let me to install compeletly as in the end I get an error that PDFCreator already exists. But I am sure I have removed it completely. What is wrong with it? Any ideas? Thanks.

check in control panel if it is available there or not. If it is not available then delete installed file from C drive and restart your system

Thanks. I have checked everywhere it is deleted compleletly but I will check again.