Error Outlook 2007 Extend.dat
/ Tutorials / Find and Delete Extend.dat Last reviewed on May 7, 2014 —5 Comments When you receive and error that Outlook can't find and add-in, the usual cause is that you uninstalled it but Outlook didn't delete the file it uses to keep track of installed add-ins. This file is extend.dat and is found in the (hidden) local app data file under your user account. It's in the same folder as your Outlook data files. You can quickly jump to it by typing or pasting the following command in the Start Search field in Windows 7 or Vista. %localappdata%\microsoft\outlook Delete it and restart Outlook. Outlook will rebuild the extend.dat field and the errors should go away. In most cases, you'll need to restart Outlook for any changes to take effect. Tip: when you use these commands to open hidden files and folders, you can see the contents of the folder without changing your settings for Hidden files and folders. Windows XP Location If you are using Windows XP, extend.dat (and the data files) are at %USERPROFILE%\Local Settings\Application Data\Microsoft\Outlook Type or paste it into the Start menu, run command (you can also use Windows key + R to open the run command) and press Enter. Open the Add-ins Dialog To view the installed add-ins, go to Outlook 2007's Tools menu and select Trust Center, then Add-ins. In Outlook 2010, you'll go to File, Options, Add-ins. The list of installed (and the active or disabled state) is on this screen. Click Go at the bottom of the screen to open the dialog which will allow you to enabled or disable the add-ins. In older versions of Outlook, go to Tools, Options, Other, Advanced options, Add-in Manager and COM Add-ins. Delete Extend.dat Video Tutorial MoreInformation For more information on shortcuts to the file locations, see Where Are My Files? (Outlook-tips.net) For more information on the files Outlook uses and which need backed up, see Outlook 2007 Backup and File Locations
Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Share on Skype (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)Click to print (Opens in new window) Related Posts: If you receive an error me? Ask a question, help others, and get answers from the community Discussions Start a thread and discuss today's topics with top experts Blogs Read the latest tech blogs written by experienced community members Outlook 2007 extend.dat error Kaplowitzenterprises 5 pts. Tags: Thanks! We'll email youwhen relevant content isadded and updated. Following Follow extend.dat Thanks! We'll email youwhen relevant content isadded and updated. Following Follow Microsoft Outlook Thanks! We'll email youwhen relevant content isadded and updated. Following Follow http://www.slipstick.com/tutorial/find-delete-extenddat/ Microsoft Outlook 2007 Thanks! We'll email youwhen relevant content isadded and updated. Following Follow Outlook 2007 error messages How do I recover from the following Outlook 2007 error message? "An extension failed to initialize. Cannot open file: extend.dat. The file may not exist, you may not have permission to open it, or it may be http://itknowledgeexchange.techtarget.com/itanswers/outlook-2007-extenddat-error/ open in another program. Right-click the folder that contains the file, and then click Properties to check your permissions for the folder. You don't have appropriate permission to perform this operation". I am the administrator account for this personal laptop. I cannot find the extend..dat file anywhere on my hard drive. Asked: April 23, 20094:11 AM Last updated: September 9, 20145:34 AM Related Questions extend.dat error Missing extend.dat file in Outlook 2007 Outlook Does Not Complete Loading Terminal Services profiles for active directory domain Home Dir Security and file sync aka CSC Answer Wiki Last updated: April 18, 20138:14 PM GMT Michael Tidmarsh48,865 pts. History Contributors Ordered by most recent Michael Tidmarsh48,865 pts. carlosdl80,475 pts. Thanks. We'll let you know when a new response is added. Maybe you were not able to find the file because your computer is set to not show hidden files and folders. First allow hidden files and folders (from my computer, click tools and then folder options. C
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