The default path is usually C:\Program Files\Nitro\PDF Pro\ .
Windows XP, Vista, 7 (x64 supported), or 8. Processor: 1 GHz or faster. RAM: 512 MB (1 GB recommended). Download BAGAS31 Nitro Pro 855 x64 rar
Keep the box checked to install add-ins for Word, Excel, and PowerPoint for easier PDF conversion. The default path is usually C:\Program Files\Nitro\PDF Pro\