Adobe Reader 7.0.5 system requirements

Windows XP Home Edition
Windows XP Professional 
Microsoft® Windows 2000 with Service Pack 2 
Windows XP Tablet PC Edition
Windows 2003 Server
Windows NT SP6 or 6a 

128MB of RAM min, 256 MB or greater recommended 

Up to 90MB of available hard-disk space 

Microsoft Internet Explorer 5.5 or higher