Adobe Reader 6.0.1 system requirements

Intel® Pentium® processor
Microsoft® Windows 98 Second Edition, Windows Millennium Edition, Windows NT® 4.0 with Service Pack 6, 
Windows 2000 with Service Pack 2, Windows XP Professional or Home Edition, Windows XP Tablet PC Edition
32MB of RAM (64MB recommended)
60MB of available hard-disk space
Internet Explorer 5.01, 5.5, 6.0, or 6.1