Sure.

Foxit Reader, free: http://www.foxitsoftware.com/Secure_PDF_Reader/

Just be sure to not install or enable stuff within Foxit you may not need. If all you need is a pdf reader, stick with that.

Updates are pretty frequent, just check c|net for update notifications by Carol in Spyware, viruses, and security forum (daily)

Does everything you need it to do without the bloat.