"Internet Explorer 6 has been removed from this computer" message displayed at every startup ?

SYMPTOM

Every time when you login to your user profile, you may see one or both of these message boxes:

Internet Explorer 6 has been removed from this computer. Do you want to cleanup your personalized settings for this program?

Microsoft Outlook Express 6 has been removed from this computer. Do you want to cleanup your personalized settings for this program?

This happens after setting the IsInstalled flags to 0, as a part of the suggestion in article Q318378. But, after reinstallation of Internet Explorer, the IsInstalled value should change to 1 automatically. If that does not happen, manually edit the registry and set the value to 1 in both of these locations

For Internet Explorer

HKEY_LOCAL_MACHINE
 \SOFTWARE
  \Microsoft
   \Active Setup
    \Installed Components
     \{89820200-ECBD-11cf-8B85-00AA005B4383}

For Outlook Express

HKEY_LOCAL_MACHINE
\SOFTWARE
 \Microsoft
  \Active Setup
   \Installed Components
    \{44BBA840-CC51-11CF-AAFA-00AA00B6015C}

Automate the above with this REG file

Download IsInstalled.reg and save to desktop. Right-click the file and choose Merge. To view the contents of the file (optional), open it with Notepad.