Error “iertutil.dll not found” after installing IE8

internet-explorer-8windows-xp

I rolled out IE8 to a group of test users in our organisation overnight, and after logging in in the morning, several of the users reported the error

Userinit.exe error and explorer.exe error  - iertutil.dll not found

After clicking OK, the PC just hangs with the background visible.

A few people are reporting this error in various forums, but "do a system restore" is not a good solution. We can easily roll back to IE6 by replacing the DLL, or by uninstalling IE8. We just need a flawless rollout!

We're on Windows XP Service Pack 3.

Edit:
We deploy via SMS. Initially we had 2 machines with the error, but somebody made a mistake with the test package and it rolled out five nights in a row. By the end of the five nights, 4 more machines had developed the same issue.

Best Answer

A quick google of the error message took me to this site here that appears to have the same issue as you're describing. Does their solution help you?

They're not just doing a system restore, as some of what they're describing is pulling the file from another location and copying it to the correct location on the erroring PC.

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Stop IE8 renaming files to .zip when downloading

First some background..

Your web server is determining that the file is a valid ZIP archive by using some MIME magic. So it delivers the HTTP response with the following header:

Content-Type: application/zip

When IE8 receives the file it has already been told that it is a ZIP. Then, when in it's default security setting of "Open files based on content, not file extension", it looks up a designated extension for that content type from the registry at HKEY_CLASSES_ROOT\MIME\Database\Content Type.

There are a couple of ways that you could attack this. You could amend either of the two variables on the local machine above. But I certainly wouldn't recommend changing local machine settings wherever possible - it's hackish and won't scale. The best solution would be to amend the web server either by:

Setting up a static MIME declaration for the file's original extension to be sent as application/octet-stream. This will prompt the file to be deliver as straight binary, with no content information.
Serving the files with the header Content-Disposition: attachment which will cause IE to respect the filename specified by the web server. This may not be so simple depending on your platform though.

Cannot save form data in IE8

Heres the fix http://support.microsoft.com/kb/942090

Best Answer

Related Solutions

Stop IE8 renaming files to .zip when downloading

Cannot save form data in IE8

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