Problems with PDFCreator

Looking for some help with Windows 7.  I recently installed something called Cosmi Perfect PDF Creator Essentials. This was something that I bought several years ago for an XP computer, but had never installed on that machine. 

Now my Windows 7 Internet Explorer is locking up. I wonder if there is a connection to the download. Then today I downloaded pdfforge's PDFCreator, thinking that it's a new version of the older software, and that it would eliminate my problems with Explorer. It didn't.

Please advise.