WFWG System Hangs After Running Central Point Backup (90238)

The information in this article applies to:

Microsoft Windows for Workgroups 3.1

This article was previously published under Q90238

SYMPTOMS

Your machine may stop responding (hang) after running Central Point version 7.1 Backup.

CAUSE

The virtual direct memory addressing (DMA) driver may not be configured properly or you may be using the driver supplied with Microsoft Windows version 3.1. With Windows for Workgroups and Central Point Backup, the Windows 3.1 virtual DMA driver should not be used.

WORKAROUND

If you are using the Windows 3.1 driver, replace it with the one supplied with Windows for Workgroups version 3.1. Install the file VDMAD.386 in the SYSTEM.INI file in the [386Enh] section. It should look like this:

   device=vdmad.386

Another possible solution is to increase the DMABufferSize= line in the SYSTEM.INI file in the [386Enh] section to 17 or more. For example:

   DMABufferSize=17

MORE INFORMATION

When Central Point's PC Tools installs, it checks to see if the Windows 3.1 is installed. If it is, PC Tools does not install its version of the virtual DMA driver. If PC Tools detects another virtual DMA driver installed already (VDMAD.386), it replaces it with the default virtual DMA driver (*VDMAD). Since Windows for Workgroups replaces *VDMAD, PC Tools incorrectly returns the system to the old setting.

Modification Type:	Major	Last Reviewed:	10/29/1999
Keywords:	KB90238