When using Outlook 2000, we receive the

See Microsoft article Q267858 titled, "Memory Could Not Be Read" Error Message While Doing File Operation".

http://support.microsoft.com/directory/article.asp?ID=KB;EN-US;q267858

(REMOVE SPACES from the pasted URL.)

SYMPTOMS
When you copy and paste a file, rename a file, click a command on the shortcut menu of a file, or perform any other file operation, you may receive the following error message:

Windows - Application Error The instruction at "0x00403759" referenced memory at "0x202c7971". The memory could not be read. Click on OK to terminate the program.

This problem is caused by a file extension that contains more than 260 characters to the right of the period. The buffer overfills and causes the error message to occur.

RESOLUTION

Win 2000
To resolve this problem, obtain the latest service pack for Win 2000. For additional information, please see the following article in the Microsoft Knowledge Base:

Q260910 How to Obtain the Latest Win2000 Service Pack

Windows NT 4.0
To resolve this problem, obtain the Windows NT 4.0 Security Rollup Package. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
Q299444 Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP)

STATUS

Windows 2000
Microsoft has confirmed that this problem could result in some degree of security vulnerability in Windows 2000. This problem was first corrected in Windows 2000 Service Pack 2.Windows NT 4.0
Microsoft has confirmed that this problem could result in some degree of security vulnerability in Windows NT 4.0.

MORE INFORMATION
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

Q249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Maxwell