Q: Cookie Format Change? This thread is locked from future replies

My IE9 cookies are now displaying their name in Windows Explorer in an 8 character format combination of numbers and letters rather than the actual readable web address name. For instance, Cookie: *** Email address is removed for privacy *** now appears as Cookie: YIOYF7V1.txt . This format began appearing after the last round of Microsoft updates on 8/10/2011. Was there a change made by Microsoft? How can I resolve this other than reading the individual cookie in notebook?


You may try performing a system restore to revert back to the correctly working settings and then identify the update that caused the issue, to do that follow the instructions:
a. Click Start, type system restore in the Start Search box, and then click System Restore in the Programs list.If you are prompted for an administrator password or confirmation, type your password or click Continue.
b. In the System Restore dialog box, click Choose a different restore point, and then click Next.
c. In the list of restore points, click a restore point that was created before you began to experience the issue, and then click Next.
d. Click Finish.

For more information refer this below link.
System Restore: frequently asked questions

Microsoft-Forum Moderator

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The update responsible for the change in cookie file name format is a cumulative security update for IE9 for Windows Vista (KB2586448).  When this update is removed, the cookie file names revert to their original format.  Too bad that this update has several security fixes in it, so you may not want to remove it. 

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Well it worked for the first day.  But after a startup of important updates it is back to the new format.  So much for what the consumer prefers.

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Thanks to all of you above for this posting and info.

Having this update put these file names into goobledygook completely sucks. Yes, it may be good for security purposes but when you trying to troubleshoot and remove specific cookies - well, now we have a problem.

And I've been in the cybersecurity/infosec field for quite a 'long' time and this one takes the cake.

Microsoft should have thought this one through more thoroughly...

Now we'll have to see when a fix for this - to revert back to readable file names - will take.


I truly wonder if this was vendor driven to hide their cookie files from us so we would give up on deleting the stupid troublesome cookies they leave behind???

Actually, I went looking for a utility to view cookie contents and found myself a winner and was able to easily find and delete the Google cookie I was looking for. Try AFTER removing the brackets and spaces:

www [.] [.] html  and it will take you to the IE Cookie Viewer software and then to the download page.  It may be three years old but it worked on my IE 9 Win 7 Ultimate ASUS PC.

Good luck.

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Views: 1,102 Last updated: March 28, 2017 Applies to: