BleepingComputer.com: HTTP 400 Bad Request

After installing the latest Windows updates, IE8 yields an HTTP 400 Bad Request page instead of going to certain websites (my company's webmail page, my credit union's homepage, the MS Windows Update page). Firefox and Chrome do not give the HTTP 400 Bad Request result when navigating to the same pages.

I did a system restore to back to yesterday to undo the updates, and the HTTP 400 error in IE8 went away.

So, here's a "heads up" to all you Windows XP Pro users with Internet Explorer 8.

Thanks, I'm sure that there are some users out there who may have a similar experience.

Louis

These are the updates that were/are in question:

High-priority updates
Microsoft Windows XP

Security Update for Windows XP (KB2387149)

Security Update for Windows XP (KB982132)

Security Update for Windows XP (KB981957)

Security Update for Windows XP (KB2279986)

Security Update for Windows XP (KB2360937)

Windows Malicious Software Removal Tool - October 2010 (KB890830)

Security Update for Windows XP (KB979687)

Security Update for Windows XP (KB2296011)

Update for Windows XP (KB2345886)

Cumulative Security Update for Internet Explorer 8 for Windows XP (KB2360131)

Security Update for Windows XP (KB2378111)


Is it too much to ask that Microsoft check that their OS updates work with THEIR OWN FREAKING SOFTWARE?! Apparently, the answer is yes.

If you have a malware infection, such as a BHO toolbar or proxy server, that gets partially removed when you used the Malicious Software Removal Tool, it could cause this type of behavior. You should probably determine if you have a malware infection in your IE8. You might have just System Restored yourself back into being fully infected.

This post has been edited by Gabrial: 13 October 2010 - 01:00 PM

Cumulative Security Update for Internet Explorer 8 for Windows XP (KB2360131)

Windows Malicious Software Removal Tool - October 2010 (KB890830)

It was probably one of those.

Not a proxy server (at least by checking under Tools--->Internet Options--->Connections--->LAN Settings). Possibly some malware. We'll see.

So I installed all of the updates except for these two:

Cumulative Security Update for Internet Explorer 8 for Windows XP (KB2360131)

Windows Malicious Software Removal Tool - October 2010 (KB890830)

and had no issues with IE8 getting HTTP 400 Bad Request pages.

A full scan with Malwarebytes Anti-Malware found nothing.

Next up is to install the two above updates (after creating a restore point) to see if the problem recurs.