This Tweak allows you to add the Microsoft Knowledge Base to the Internet Explorer Toolbar:

To do this, follow the next steps:

Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Extensions\{8b2d996f-b7d1-4961-a929-414d9cf5ba7b}] "CLSID"="{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}" "ButtonText"="Microsoft Knowledge Base" "Icon"="%SystemRoot%\\System32\\shell32.dll,281" "HotIcon"="%SystemRoot%\\System32\\shell32.dll,281" "Default Visible"="Yes" "Exec"="http://support.microsoft.com/default.aspx?scid=FH;EN-US;KBHOWTO" "MenuText"="Microsoft Knowledge Base"

Make a new text file and rename it to for example "mskb.reg". The copy and paste the above into it and save it. Then merge it into the registry by double clicking it