1. Quit Internet Explorer and Outlook Express
2. Open Control Panel -> Add/Remove Programs
3. Untick "Internet Explorer" and click the "Next"-button and let Internet Explorer be uninstalled
4. To reinstall again open Control Panel -> Add/Remove Programs and tick "Internet Explorer" and click the "Next"-Button

rundll32.exe setupapi, InstallHinfSection DefaultInstall 132 %windir%\inf\ie.inf

1. Quit Internet Explorer and Outlook Express
2. Using Windows Explorer, open the %SystemRoot%\Inf folder. (By default, this is the Winnt\Inf folder or Windows\Inf folder)
3. In the menu Tools -> Folder Options, make sure that "Show hidden files and folders" is ticked and "Hide file extensions for known file types" is cleared
4. To reinstall Internet Explorer, right click the following file and click "Install"

   Ie.inf

5. To reinstall Outlook Express, right click the following file and click "Install"

   Msoe60.inf

1. Quit Internet Explorer and Outlook Express
2. Set the following DWORD registry key to enable reinstall of Internet Explorer

   [HKEY_LOCAL_MACHINE \SOFTWARE \Microsoft \Active Setup \Installed Components \{89820200-ECBD-11cf-8B85-00AA005B4383}]
   IsInstalled = 0 (Default = 1)

3. Set the following DWORD registry key to enable reinstall of Outlook Express

   [HKEY_LOCAL_MACHINE \SOFTWARE \Microsoft \Active Setup \Installed Components \{44BBA840-CC51-11CF-AAFA-00AA00B6015C}]
   IsInstalled = 0 (Default = 1)

4. Start installing Internet Explorer