You didn't say where did you get PDF Suite from. Open Windows Explorer. Go Tools>Folder Options>View tab, put a checkmark next to Show hidden files, and folders. Upload following files to http://www.virustotal.com/ for security check: - C:\PDF Suite\PDF Suite.exe - C:\PDF Suite\Gs\gswin32c.exe - C:\PDF Suite\Help\PDF Suite Presentation.exe IMPORTANT! If the file is listed as already analyzed, click on Reanalyse file now button. Post scan results.