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Outlook has slowed down considerably. Inbox I keep at 500-1000?

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  • jkfrancis Aug 04, 2010

    GHreat thank you. Worth every penny



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The easiest solution is to use an optimization add-in for Outlook, like Weight Diet. This Outlook add-in is designed to speed up Outlook by reducing your mailbox database (PST) size through a set of optimization tasks, such as: eliminating duplicate emails or obsolete messages (mail failure notifications, out-of-office emails, etc), moving file attachments to disk (outside of the PST file) or compacting the PST file.

Starting from the above scenario and assuming you don't want to use an optimization wizard, here is a to-do list for making Outlook to load and run faster:

  • Always archive your incoming emails: there is no need to keep thousands of emails in your active mail box. You can just setup Outlook so it automatically move older emails to an archive folder. This way, when starting Outlook or when switching folders, the program doesn't have to load a huge list of emails. To archive a folder, simply right click on it, select its Properties, then go to the AutoArchive tab to configure your archiving settings.

  • Make sure the default folder that is displayed when Outlook starts is not too crowded with emails. Try to move emails away from the default starting folder to archive folders or to other sub-folders. For example, if you receive many emails from a contact, you can define a rule so all those emails are automatically moved into a specific folder. As less items Outlook has to display at startup, as faster it shall load.

  • Pay a lot of attention to 3rd party addins or addons. While they can bring benefits for your workflow, they surely add to the Outlook lag. Keep only the addins that you know you are using on regular basis: although you may not use an installed addin, it still consumes Outlook resources simply by "being there". You can see a list of your currently installed addins by the Tools menu -> Options -> Other -> Advanced Options -> Add-in Manager.

  • If you use Outlook with a slow Internet connection to connect to a mailbox on a Microsoft Exchange server, you can improve response time by minimizing how much information Outlook transfers over the connection and how often these transfers occur. The best way to accomplish this is by working offline instead of online. As an alternative, you can configure Outlook to download only the email headers of incoming emails.

  • On a busy environment, Outlook needs to handle large mailbox files (PST files). You may want to defragment the disk partition on which your PST file is located. Since new information (emails or else) is continuously added by Outlook to your personal folders file, the PST file tends to become fragmented very quickly. As a result, it is a good idea to schedule, at least weekly, a disk defragmentation for the partition where the PST file is stored. If your defrag tool allows it, you should move the PST file at the beginning disk sectors of your disk partition: this way will hardware will require less time to access & read the PST file.

  • Unless it deals with critical errors, Outlook doesn't always report less important errors. By running the "Detect and Repair" function (from the Outlook Help menu) on regular basis, you rest assured that nothing bad is happening in the background.

  • Avoid switching tasks (ALT + TAB) while the main Outlook window is maximized. If you need to switch to a different application, make sure you firstly minimize Outlook, then go to the other program. Otherwise, it may end up using so much memory that it stops responding.

  • The default Outlook settings makes it work with the Windows Instant Messenger as often as possible. As a result, switching between emails or folders can be very slow, as the Windows Messenger needs to load its information, too. You can disable the use of Windows Messenger for Outlook from the Tools menu, under Options -> Other -> Person Names (unmark the related checkboxes).

  • Microsoft Office is delivered with speech and handwriting recognition features. Outlook also loads them and they increase the memory usage of Outlook. Here is a Microsoft article explaining how to turn off these features.

  • If you use to work on the same Windows session for days and if you need to keep Outlook up and running all the time, try closing & restarting Outlook at least daily. Especially due to 3rd party addins, Outlook can require more and more memory resources if you keep it open for a longer period of time.You can also check this,


  • Posted on Aug 04, 2010


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    Posted on Jan 02, 2017


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    Many of dozens of emails disappeared

    In case no one of methods can't aid, then take a look at .dbx repair tool

    Visit this blog, it might be effective -

    Here is the full article:

    Follow the instructions below:

    1.Shut down Outlook Express
    2.Click [Start]
    3.Select Find
    4.Select Files or Folders
    5.Enter the name of the corrupt folder. For example, inbox.dbx
    6.Click [Search]
    7.When search has found the folder, right-click on it and select rename
    8.Call it inbox.old (where inbox is the original folder name)
    When you restart Outlook Express, a new folder will be created. You will need to repeat the above steps for each folder that is corrupted. The folders used by Outlook Express are called:
    • inbox.dbx
    • outbox.dbx
    • sent*items.dbx
    • deleted*items.dbx
    • drafts.dbx

    Aug 28, 2017 | Express Computers & Internet


    How to repair Outlook folders using the Inbox Repair Tool

    Inbox repair tool(scanpst) is the best tool that can be used when you are finding any difficulties to connect your inbox folders or pst files or it is reporting that your Inbox folders or Outlook PST file may be damaged in Microsoft Office Outlook 2000 (or higher).Scanpst is a tiny tool installed by default when installing Microsoft Office 2000 or higher.

    PST files or Personal Folder Files are used by Microsoft Outlook for storing Outlook data, including mailbox files, email folders, contacts or any other personal data related to Microsoft Outlook.

    By default, Microsoft Outlook stored these PST files at the following location:

    "C:Documents and Settings\USER_NAME\Local Settings\Application Data\Microsoft\Outlook",

    where USER_NAME is your Windows logon name.

    The default PST filename for your active mailbox is Outlook.pst, while the archive file is stored as archive.pst.

    "Before doing any types of repairing pls keep a back up of the pst files"

    Using Inbox repairing tool

    By default, Microsoft Outlook will install the Scanpst.exe file within your Program Files folder, in 'C:\Program Files\Common Files\System\MSMAPI1033'.

    If you can't find the Inbox Repair Tool, you can download it from here then copy it to the above folder.

    Make sure Microsoft Outlook is not running when you try to run the Inbox Repair Tool. When starting it, you should see the following screen:


    If you get an error message like the following one:

    then make sure you copied the Scanpst.exe file to the right location. If you still have problems running it, then search your hard disk for a file named "CNFNOT32.EXE" then run it: it should unpack and copy the Scanpst.exe file to its default path ('C:\Program Files\Common Files\System\MSMAPI1033').

    Once you started the Inbox Repair Tool, use the Browse button to select your personal PST file. Remember, its default location is "C:Documents and SettingsUSER_NAMELocal SettingsApplication

    DataMicrosoftOutlook",(It can be vary depending on how where you configured the pst files). where USER_NAME is your Windows logon name. Then click on the Start button. When the scanning process is done, you should see a notification screen like the following one:


    Make sure you mark the checkbox for making a backup of the scanned file, then click on the "Repair" button. When this process is done, you should be able to properly start Outlook and use your recovered personal Outlook folders

    on Mar 17, 2010 | Microsoft Outlook 2003 for PC

    1 Answer

    How do I get my original inbox back?

    You can use DBX Repair Kit. Outlook Express inbox.dbx repair tool fixing of DBX file corruption. DBX Repair Kit helps to repair DBX file of Outlook Express.

    For more:

    Nov 02, 2015 | Microsoft Outlook Express

    2 Answers

    Outlook Express losing inbox messages?

    When you start Outlook Express, the contents of your Inbox folder may be missing. The contents may be replaced with a new first-run "Welcome to Microsoft Outlook Express" message. You do not receive a warning that the email messages have been deleted, and the missing email messages are not in the Deleted Items folder.

    If it doesn't help, look at the answer here:


    Outlook Express Repair Kit. A power-packed Microsoft Outlook Express repair tool offering record efficiency, accuracy of recovery and full automation of the recovery process. A top choice for users who don't know how to repair Outlook Express 6.0 and above without handing their data to expensive and slow data recovery services.
    For more information:

    Dec 24, 2014 | Microsoft Outlook Express

    4 Answers

    My outlook dbx file goes currupt and invisible after every 2 months pls suggest.

    The recovery of e-mail folders features some particularities that should be taken into consideration before choosing a solution for the recovery of Outlook Express folders.

    Download:- Outlook Express Recovery DBX Recovery Software

    Sep 02, 2010 | Microsoft Outlook Express

    2 Answers

    Outlook express

    dear fando,

    This is usually down to a corrupt or over-full email inbox. Outlook Express is not very good at holding large amounts of emails especially if they have large attachments. I had a user this morning with a 2.5 GB inbox.

    Backup/rename Inbox (C:\Documents and Settings\(User)\Local Settings\Application Data\Identities\{GIU}\Microsoft\Outlook Express\inbox.dbx -> inboxbak.dbx).
    Close Outlook Express.
    Open Outlook Express.
    Outlook Express will have created a whole new Inbox.
    Your email should now work.

    Best wishes.

    Jan 04, 2008 | Audio Players & Recorders

    1 Answer


    you need to run a inbox repair tool.

    Make sure you close outlook

    Start > My computer > Tools > Folder options > General tab click on show hidden files and folders > Apply ok

    Go to the follow wing location to find scanpst.exe
    if you are using Outlook 2007
    C:\Program Files\Microsoft Office\Office12
    If you using Outlook 2003
    C:\Program Files\Microsoft Office\Office11

    Double click on SCANPST.EXE
    Click on browse go to following locaiton where your pst file as been save
    C:\Documents and Settings\Robyn M. Drothler\Local Settings\Application Data\Microsoft\Outlook\outlook.pst

    Click on start > then click on repair

    Sep 11, 2005 | Palm Treo 600 Handheld

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