Automation Anywhere is supported on Windows Vista, Windows 2003, Windows XP, Windows 2000 & Windows NT
On Windows NT 4.x operating system VB6 runtime is required. Many software programs install VB6 runtime automatically so it is likely that your NT 4.x machine already has VB6 runtime. However if you encounter an error saying DLL file not found, you can download VB6 runtime free from http://www.microsoft.com/downloads/details.aspx?FamilyID=bf9a24f9-b5c5-48f4-8edd-cdf2d29a79d5&DisplayLang=en