Why Can’t Open Attachments in Outlook 2010?

Sometimes, you might be getting a Can’t Open Attachments In Outlook error while opening or saving Outlook attachments. When this error occurs, it will not allow you to access Outlook attachments and even some other Outlook files that you want to open.

Therefore in this article, we are discussing some of the most accurate and effective solutions to solve this error. We will also discuss various causes behind the occurrence of this error. So, if you want to get rid of the error in no time, then go through this article right below.

Causes Behind Can’t Open Attachments in Outlook

Before going to the solutions of this error you must know the causes of the error. There are a lot of reasons for the occurrence of the error Can’t Open Attachments In Outlook. We have discussed below some of the most common causes that lead to the occurrence of this error. You must go through it to know about the error.

  1. When a user is not granted access to open any temporary attachment file or folder which is preserved on the Server. And when the subfolder, that contains default copies of temporary attachment files reach its storage limit completely. Then, such type of error occurs.
  2. One of the main reason behind this error can also be that Outlook does not grant permission to access suspicious files or attachments, which can damage or harm the user’s Outlook database or some other system files badly. Hence, the Outlook attachments or folders get automatically locked displaying such error.
  3. If a user tries to open Outlook attachments and the Outlook.PST files are corrupted or in an inaccessible state then this error may occur.
  4. If a user continuously accesses the same MS Outlook files or attachments and their temporary files kept in the Temporary folder. Then, the MS Outlook does not grant any permission to save the temporary file of the same file name at the temporary path location and starts displaying such an error.

Solutions to Resolve Can’t Open Attachments in Outlook 2010 Error

After knowing the possible causes for the occurrence of this error, you must be wondering to know the possible solutions for the Can’t Open Attachments In Outlook 2010 issue. We have come up with some of the most accurate and easy solutions.

Method 1: If the cause is related to Temporary Internet folders:

  • Step 1. Go to Start at the bottom left of windows screen and launch Run box from there.
  • Step 2. Type “REGEDIT.EXE” in the Run box. A registry window will appear, click on the Edit tab, and then on Find option.
  • Step 3.  A dialogue box will appear. Write “OutlookSecureTempFolder” in the dialogue box.
  • Step 4. Search for the registry key that has a real folder location.
  • Step 5. Now, copy the folder’s path.
  • Step 6. Now, go to the Run box again in the Start menu and paste the particular path of the folder and press the Enter key from the keyboard.
  • Step 7. Following this further, the folder gets opened automatically in the default browser.
  • Step 8. Just delete all the files in that folder.
  • Step 9. Exit the browser and launch it again. Now, you should try opening the Outlook attachments, which you were not able to open.

Method 2:- If the cause is related to Default Security Protocols

If you are getting this error because of any default security protocols, then you should modify and restore the Security settings of Outlook manually. However, you must be knowing that modifications of the security registry purely depends on the versions of the Operating System. Therefore, perform all the steps as mentioned below. We are discussing the steps for the older version, as well as, for the latest versions of MS Windows.

Windows XP Version:

If you are using a system that uses an older version of Windows like Windows XP, 7, 8 and 8.1 version of the Operating System, then you need to do the below-mentioned steps.

  • Step 1. Go to Start at the bottom left of windows screen and launch Run box from there.
  • Step 2. Write the command “%SystemRoot%\system32\restore\rstrui.exe” and press the Enter key from the keyboard.
  • Step 3. A new window will appear with the Welcome to System Restore page” message.
  • Step 4. Now, click on the “Create a restore point” and then on Next button.
  • Step 5. A new page will appear, here direct the new restoration location of the file and select the Create button followed by the Close button.
  • Step 6. Now, repeat step 1, 2 and 3 once again.
  • Step 7. After repeating all the first three steps click on the “Restore my computer to an earlier time” option and tap on the Next button.
  • Step 8. It will take some time and a new window will appear, now click on the system checkpoint. Select “Guided Help (Registry Backup)” from the list and tap the Next button.
  • Step 9. A message will appear on your screen displaying all the configuration changes made, click on the OK button. A confirmation page will be opened, select the Next button followed by the OK button.

Windows 10 version:

If you are using a system that uses Windows 10 version of the Operating system, then you need to do the below-mentioned steps.

  • Step 1. Launch the run box by pressing Windows +R key from your keyboard and type “REGEDIT.EXE” in it.
  • Step 2. If the permission window is displayed, then type your administration password.
  • Step 3. A Registry Editor window will appear, find the required registry key which you want to change.
  • Step 4. Now, you should click on the File icon, and then Export option.
  • Step 5. An Export Registry File window will appear on the screen, locate the place to restore the backup and rename it to identify when needed. Now, select the Save button.


You can apply all the steps and methods discussed above to fix Can’t Open Attachments in Outlook error easily. Therefore, we presume the post might have been able to tell you which methods you should consider resorting to if you have to get rid of the issue. Apply them and make a difference in the situation you are in. If you need to read about related topics, follow our posts.

Maria Colombo
Maria Colombo
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