Browsers Windows

Really Delete Your Browsing History – wipe MRU & index.dat files

Guy McDowell 23-12-2008

delete browsing history hangsHave you visited some sites you’d rather others didn’t know about? Is your tin foil hat fitting a little tight? Well you’re about to get a little more paranoid or at least a little more educated.


You may have used some sort of software to “erase your tracks” after doing some web surfing, but the traces are always there. As my wife is fond of saying, “no matter where you go, you leave a footprint.” She’s a Zen master or something.

So where do the tracks get left? Cookies and temp files are obvious and you can take care of them with software like CCleaner. You may also want to use secure file deletion programs to completely remove deleted files from your hard drive such as Eraser How To securely Retrieve and Delete PC files Read More .

But what about the stuff you might not know about yet? Here’s a couple of areas that may retain information you don’t want others to see, and freeware to help you deal with them.

Delete Index.dat files

This works like a database. It’s not easily read by the human eye but contains the tracks of what programs you used, sites you visited, and even occasionally passwords. It resides in various places on your Windows computer, and stores information such as your computer usage history, cookies, and browser cache. You can check and delete index.dat file contets with Index.dat Suite.

With the Index.dat Suite you can:

  • Use it as an index.dat viewer: Make any index.dat file readable, right from within the Index.dat Suite program. Here’s a screenshot of what the Cache Index.dat file says about my recent visit to Microsoft. I can tell you that in an investigation into a user’s inappropriate use of a business computer, I came across a cookie that had the username and password to a major adult dating site in plain English, using Index.dat Suite. Good thing I’m an ethical administrator.
  • index.dat viewer

  • Look through the Cookies and History index.dat files to see what sites were visited and when.
  • Search for index.dat files anywhere on your computer, open them, and read them.
  • Filter the type of files shown from the index.dat file.
  • elect records and delete them, which is probably the most important part of this software that this article relates to.

You may be asking now, “Guy, why don’t I just open up the index.dat file, delete everything and then save the file again?”

I would answer that you could do that, but if you are truly a tin-hatter, you would know that a completely blank index.dat file is VERY suspicious to the black-ops type searching your computer. Or your administrator. Same difference.

Delete MRU Keys from Windows Registry

In the Windows Registry (a scary place to be) there are many MRU keys. MRU stands for “Most Recently Used”. Take a look at the screen shot below and you can tell exactly when, and what image I worked on in Photoshop. There can be literally thousands of records like these in your registry. So you can do a lot more with this tool than deleting your browsing history.

delete mru


MRU Blaster can help you find these records and remove them. (Always back up your registry before altering it – if you don’t know how to do that, don’t mess with the registry.)

MRU Blaster can be set up to automatically clean out MRU registry keys every time you log off or on, or you can run it manually. I prefer to use it manually, because the MRU keys provide the information for the auto-complete feature in a lot of programs. MRU Blaster’s settings window allows you to choose which common MRU keys to check or ignore. This will help you preserve a lot the auto-complete information you may like to keep.

Here’s what a typical scan shows on my computer – 100 MRU lists with 1041 MRU Items. That’s a lot of information about my computer using habits.

delete browsing history registry


The detailed results don’t tell me a lot about what the MRU keys contain. However, just knowing that there are 1141 footprints on my computer tells me it needs to be cleaned. You can select individual keys to clean or leave them all checked for a thorough cleaning.

Now you are like a ninja dancing on rice paper. No footprints!!  Well, at least none that a non-ninja could find.

If you know of any other good track covering tips, let us know in the comments.

Explore more about: Browser Cookies, Online Privacy, Windows Registry.

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  1. Steven
    December 17, 2009 at 7:13 am

    HI !

    Does this program work with MAC OS X ???


  2. Dan
    December 26, 2008 at 3:07 pm

    How about the "Stealthier" Add-on for Firefox? That prevents all information from being cookied and cached (if you turn it on). Does this apply to index.dat and the registry as well?

    • Guy McDowell
      December 31, 2008 at 10:53 am

      I haven't tried that add-on. I'll have to look into that.
      As for the registry, browsing history isn't really stored there. The MRU keys in the registry is more for applications such as Office, Photoshop, etc. So it tells about your computer use.

  3. Ijaar
    December 26, 2008 at 7:29 pm

    How about the new IE based browser Xtravo?

    They claim its faster and better then any browser.
    [Broken Link Removed]

    • Guy McDowell
      December 31, 2008 at 10:57 am

      I checked out Xtravo's site at Based on the poor quality of their website design, I wouldn't download it.

      Also, I wonder if basing a browser on the same code as another browser is going to solve any problems. IE has a lot of problems and isn't terribly standards compliant. Why would I want something based on that? Just my two cents worth.

  4. aartha
    December 24, 2008 at 8:06 am

    nice info

  5. Regine
    December 24, 2008 at 5:29 am

    Thank you for sharing and Happy Holidays.

  6. aartha
    December 24, 2008 at 8:04 am

    i hope we can delete the cookies with browser provided software,we can identify the cookies tat are stored in our system,if we delete those i guess browsing history get deleted,am i right.

    my hotdeal Corsair 8 GB flashdrive for $10

  7. venkat
    December 23, 2008 at 11:40 pm

    MRU Blaster cleans most recently used lists,very useful.Ccleaner is useful in browsing cache stuff.

  8. xulsolar
    December 23, 2008 at 8:13 pm

    Man..Just use Ubuntu with Firefox and a couple of addons and forget about security...

    • Guy McDowell
      December 24, 2008 at 9:51 pm

      Unfortunately, changing operating systems and browsers isn't always as easy as it sounds. For instance, where I work, there is only one piece of software to accomplish the field work and it only runs on Windows. Also, our web-based applications were developed to run on IE and aren't very compatible with Firefox due to CSS rendering problems.

  9. WJ Kinsey
    December 23, 2008 at 6:43 pm

    Index.dat Suite does not appear to support Vista ???

    • Scott
      December 23, 2008 at 11:06 pm


    • Neil
      July 16, 2009 at 1:46 am

      Index.dat Suite I have found to be poor. Couldn't get it to delte index.dat files. Viwer was slow. I prefer Index.dat Analyzer from Systenance. Quicker, only over-writes index.dat files but better than nothing.

  10. Nick
    December 23, 2008 at 5:57 pm

    his works like a database. It’s not easily read by the human eye but contains the tracks of what programs you used, sites you visited, and even occasionally passwords.

  11. IMOdotcom
    December 23, 2008 at 5:03 pm

    Very Useful!!
    Thank you.