For the "Full Story" go here :
http://www.microsoft.com/windows2000...p4/default.asp
Release Notes and Known Issues :
Application Compatibility:
- Some Programs That Use Impersonation Do Not Work Correctly After You
Install Windows 2000 Service Pack 4
- Internet Explorer Times Out While It Loads Web Pages If Norton
Internet Security 2001 Is Installed
- Errors Occur When You Use a .Net Framework 1.0-Based Program on a
Windows 2000 Service Pack 4-Based Terminal Server
Setup:
- Some Windows 2000 Hotfixes May Cause a Conflict with Service Pack 4
(SP4) for Windows 2000
(This issue does not affect any Windows 2000 hotfixes from the Microsoft
Download Center or the Windows Update Web site, including Windows 2000
Security Updates. This issue affects only a small number of post-Service
Pack 4 (SP4) hotfixes that were available only from Microsoft Product
Support Services.)
http://support.microsoft.com/?kbid=813432