|What you're talking about is called OpenCandy. It's falsely identified as a virus. Like many free programs, PrimoPDF also includes the option to install an additional program. Unlike most others, PrimoPDF's supplement program installation is opt-in instead of opt-out. So, if you rush through the installation, you still won't install the supplement program: Microsoft's Bing Toolbar. This information is mentioned in that tutorial I posted.|
You can find more information about PrimoPDF's partnership with OpenCandy here:
Once PrimoPDF is installed, you're done with OpenCandy. I've seen Avira and Microsoft Security Essentials identify the PrimoPDF setup file as malware. Even though it is by definition because it bundles software together, it's not the type of malware that causes problems with your computer. As mentioned, the supplement program is opt-in not opt-out, so you'll only install it if you explicitly say so.
It's unfortunate that uninformed people are exaggerating things to make this awesome program sound malicious, but now you're better informed. That's the reason I like installation tutorials like that, so you know exactly how the setup process will work and can avoid installing supplement programs.
Apologies if I don't respond to your reply immediately. I don't check this site daily, but you're welcome to PM me as a reminder.