is IE7 now your only internet browser ?
as long as system restore failed you can try other popular browsers like maxthon or Firefox !
if you really want to fix you IE you can try to remove the installation files form the add and remove programs.
some time there will some problems and missing files thought the uninstall process.
if you got some messages liked that you can try to fix it using this tool after rebooting the computer.
this is the only tool I'm aware of to fix IE problems !