If you surf the web, receive e-mail, or download files from bulletin boards, you are at the highest risk of having your data targeted by a virus. Virex has the ultimate solution with its Universal Scan-At-Download feature. Turn it on and Virex gives you total protection, shielding you from all downloaded viruses. One click turns it on and off - no locating folders, files, etc. Scan-At-Download will scan Zip archives, as well as files compressed by StuffIt Deluxe, Compact Pro and more. Virex even catches viruses hidden in e-mail attachments. If you do download an infected file, Virex will alert you and quickly repair the file without launching other applications, saving valuable time.
* Full MacOS 9 support
All Virex components include full support for MacOS 9, including the new multiple users function. Individual users can specify their own schedules for Virex operations that run when each user logs in. The system Owner can also schedule updating and scan operations that apply to the entire system, and that will run no matter who has logged in. The Virex software takes full advantage of the MacOS 9 Appearance Manager, but can also run without this MacOS feature enabled, though the Schedule Editor will not function in this mode. Virex software will also display and use Navigation Services dialog boxes, if you have them enabled on your system.
* Advanced Scheduling component
The Virex application now includes a redesigned and improved scheduling module that allows you to set times during which the Virex application will look for viruses on your system and repair any infected files it finds. You can also use the scheduler to have the Virex application update its Virus Definition files and scan engine at regular intervals.
* New Electronic Updating
This Virex release makes updating your Virus Definition files and the Network Associates scan engine simple and painless. Just use the eUpdate module in the Virex Preferences dialog box to designate the location from which you want to download new files. Next, use the Virex Schedule Editor module to tell the application when you want to perform the update task.
* Improved scanning performance
This Virex release includes the latest revision to the McAfee and Dr Solomon Olympus scanning engine, which provides consistent, industry-leading virus detection and removal rates. The engine detects and removes all of the viruses aimed specifically at the Macintosh platform, along with those cross-platform agents that affect the Macintosh platform.
* Better security
The Virex application includes a Security preferences panel that allows you to protect your scan task settings from tampering. Use this feature to configure, then lock down, the configuration options you choose for Virex users on your network, or to prevent other users who log on to your Macintosh system from altering your settings without authorization.
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Virex 6.2 and 6.2 - Version: 6.1.4160b2, 2/3/2005 12:41PM PST 
But McAfee has released a new version 6.2 apparently. The New DAT files for Feb are for 6.2 so try to update your files if you can.
And try to find the placed on McAfee's site to update 6.1 to 6.2!!! Good luck!