JSI Tip 8574. You cannot post any data to non-NTLM authenticated Web site after you visit one that is NTLM authenticated?

NOTE: The subject behavior has been corrected by the latest service pack for some operating systems.

If you experience the subject behavior:

1. Close all instances of Internet Explorer:

2. Copy / Paste the following into an empty Notepad.exe window:

REGEDIT4

\[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\]
"EnableNegotiate"=dword:00000000
"DisableNTLMPreAuth"=dword:00000001

3. Save the file as "%TEMP%\TEMP.TMP".

4. Open a CMD.EXE window and type the following:

regedit /s "%TEMP%\TEMP.TMP".