IE[9-11] amnesia - Cookies lost when Windows or IE crashes - by Matthew Verstraete

Status : 

  Not Reproducible<br /><br />
		The product team could not reproduce this item with the description and steps provided.<br /><br />
		A more detailed explanation for the resolution of this particular item may have been provided in the comments section.

ID 864147 Comments
Status Closed Workarounds
Type Bug Repros 6
Opened 4/30/2014 6:19:51 AM
Access Restriction Public


In IE 9, 10 and 11 on both Windows 7 and 8 if the system is shutdown unexpectedly (BSOD, power loss, system freeze, etc.) When windows comes back up IE will have forgotten all cookies, no matter how old they are, forcing users to have to reconfigure all website auto-logins, preferences, etc. This issues has been reported by many users many times. There is no reason this should be happening, no other browser has this problem! Links to many other people reporting this same problem:
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Posted by Microsoft on 7/28/2014 at 1:22 PM
Thank you again for your feedback.

At this time we will close out this feedback item. We would like to invite you to reopen
the feedback, if you are able to reproduce the issue.

Best regards,
The Internet Explorer Team
Posted by Microsoft on 7/10/2014 at 11:45 AM

Following up on this open feedback item regarding cookies lost when Windows or IE crashes.
We have tested this issue on the latest releases of IE 11 and are not able to reproduce the issue.
We would like to confirm with you that the issue also appears to be resolved, prior to closing out this feedback item.

If you are still able to reproduce the issue, can you please provide the following:
1)IE version with build number listed in the Help|About dialogue.
2)Additional information such as specific URL / a video, to help us recreate the issue you are observing.

Every piece of feedback we receive is important to us and helps us improve the quality of Internet Explorer.

Best regards,
The Internet Explorer Team
Posted by Microsoft on 5/1/2014 at 10:48 AM
Thank you for your feedback. We will be investigating this issue further.

Best regards,

The Internet Explorer Team
Posted by Noel Carboni on 5/1/2014 at 10:10 AM
It's possible Microsoft folks themselves have both good quality hardware and run a tight ship software-wise, something that's a lot more doable once you understand the structure of the operating system, so they may actually see crashes rarely if ever. I honestly can't remember the last system crash I had. And with UPS power my systems doesn't get shut off unexpectedly.

My point is that a secondary problem like this may literally go unnoticed.

Posted by Matthew Verstraete on 5/1/2014 at 6:09 AM

Not sure how you got "guarantee to happen" from my report but it happens more often then not. I have has this happen on two Win7 IE 10 laptops at work, my IE 11 Win 8 laptop, and sever different installs of Win 7 using IE 10 and 11. This NEVER happens with the other browsers so they are apparently doing something right that MS can't figure out how to do.
Posted by mewzical on 5/1/2014 at 2:57 AM

I am experiencing this issue since Vista days (till date: Windows 8.1.1).

If you are running Firefox, Safari, Chrome and IE, on system crash none of the non-IE browsers lose user preferences and SSO state while chances are IE will undergo amnesia (at random frequency). Since you can't reproduce this issue with fixed reproduction steps; unless you test it with rough random crash scenarios, OR a member of IE team care review users event logs collected by Windows OR review the whole boated memory model; this will always be the problem with Internet Explorer.

I am very surprised that none of the Microsoft employee or partners (those who matters) ever face this issue. Either you guys don't use other browsers or close eyes and ignore when it happen, to save embarrassments of your colleagues. But what about millions of people/consumers/entities using IE for decades facing this issue? Are they worthy enough that IE team diagnose this issue? Or is everyone lying in your opinion; there is no such issue?
Posted by EricLaw [ex-MSFT] on 4/30/2014 at 2:19 PM
WinINET uses a memory-mapped index (pre-IE10) or a proper database (IE10+; see to keep track of cache files and cookie files.

It is correct to note that these datastructures can be left in an inconsistent state if the operating system is abruptly halted (BSOD, power failure), leading to cookie loss.
It is incorrect to imply that this is guaranteed to happen.