System Requirements - avast! Professional Edition

Please note: hardware configurations described below represent the minimum recommended system specification for that operating system.

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For a computer running Windows® 95/98/Me:
486 Processor, 32MB RAM and 50MB of free hard disk space.

For a computer running Windows® NT® 4.0:
486 Processor, 24MB RAM and 50MB of free hard disk space and Service Pack 3 (or higher) installed

For a computer running Windows® 2000/XP® Workstation (Not Server):
Pentium class Processor, 64MB RAM (128MB recommended) and 50 MB of free hard disk space

For a computer running Windows® XP® 64-bit Edition:
An AMD Athlon64, Opteron or Intel EM64T-enabled Pentium 4 / Xeon processor, 128MB RAM (256MB recommended) and 50 MB of free hard disk space

For a computer running Windows® Vista:
Pentium 4 processor, 512MB RAM and 50 MB of free hard disk space

The program itself requires about 20MB of hard disk space; the remainder of the recommended space is reserved for the virus recovery database file and its index (VRDB, also known as the "integrity database" from the previous version).

A functional MS Internet Explorer 4 or higher is required for the program to work.

This product cannot be installed on a server operating system (Windows NT/2000/2003 Server families).