when i fell boring (off line) I check out Registry (With whom i think Most of the people here
are familiar with).Ok now what you got to do is got to start
then run
now type regedit. or Go to c:/windows/regedit
ok now Expand HKEY_CURRENT_USER
then Software then Microsoft
then Internet explorer
then Typed Urls
the delete those url’s which you don’t need.

note:Don’t delete the default one