If you get the restrictions message, then inetcpl.cpl certainly exists
in your System folder.
Use Regedit.exe and search for NoBrowserOptions and remove it.
It is most likely to be here (but not necessarily)
HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\Restrictions
If you are unfamiliar with Regedit, then ensure you know how to
restore your Registry in case of error and it is a good to export any
key before deleting.
Check the startup (Start-Run-MSCONFIG-Startup tab) for any unknown
items if it is reset on reboot.
You might try this snippet from Mike Burgess first if you use SpyBot:
'Did you by chance run SpyBot's Immunize feature?
If so, you can unlock by unchecking the option to "Protect IE Control
Panel" '
....Alan