How to Delete a BHO From Internet Explorer

By Nina Rotz

BHO, which stands for Browser Helper Object, is an extension or plug-in that add functionality and additional features. Toolbars and search assistants work as BHOs, but some viruses disguise themselves as BHOs. A virus BHO will display in the antivirus report after a full antivirus system scan, along with its CLSID, a registry key that corresponds with a BHO. The key must be deleted from the registry in order to delete a BHO from Internet Explorer.

Delete BHO in Computer Registry

Step 1

Type "regedit" (without quotes) from the Search pane.

Step 2

Double-click on the "Registry Editor" icon.

Step 3

Double-click on the "HKEY_LOCAL_MACHINE" folder.

Step 4

Double-click "Software," "Microsoft," "Windows," "CurrentVersion" and "Explorer" folders.

Step 5

Double-click the "Browser Helper Objects" folder to reveal a list of available objects.

Step 6

Record the BHO's CLSID key. An example of a CLSID key is {F02B00B3-A88C-4EF1-98FE-557F1DAF6E4D}.

Step 7

Right click on the CLSID key of the BHO you want to remove.

Step 8

Select "Delete" from the drop-down menu.

Step 9

Double-click on the "HKEY_CLASSES_ROOT" folder, located on the left pane.

Step 10

Double-click the "CLSID" folder.

Step 11

Right-click on the CLSID key, which should be the identical key found in the "Browser Helper Objects" folder.

Step 12

Select "Delete" from the menu list to remove the key.

Step 13

Close the Registry Editor.

Changing Internet Explorer Settings

Step 1

Open a new Internet Explorer window.

Step 2

Click "Tools" and select "Internet Options".

Step 3

Click the "Advanced" tab.

Step 4

Click "Restore advanced settings."

Step 5

Click the "Reset" button next to "Reset Internet Explorer Settings." Click "Apply" to confirm your changes.

Tips & Warnings

  • You should run your antivirus program after performing this operation.