Minimum System Requirements Operating System : Windows 7 64 bit Hard Disk : Approximately 2.2 GB of available hard-disk space for the recommended installation, which includes full TekExpress installation and distributed components. Software : Iron Python 2.7.3 : PyVisa 1.0.0.25 : Microsoft .NET 4.0 framework : Microsoft Internet Explorer 6.0 SP1 or later : Microsoft Photo Editor 3.0 or equivalent software for viewing image files : Adobe Reader 8.0 or equivalent software for viewing portable document format (PDF) files