You should watch so many porn!
It will be in your Registry too,
you need to know what you are doing.
Windows , Start , Run.
Type Regedit in the Run window en press enter.
Look for HKEY_CURRENT_USER and unfold it.
Look for Software unfold it and so on.
HKEY_CURRENT_USER --> Software --> Microsoft --> Internet Explorer
or
HKEY_CURRENT_USER --> Software --> Mozilla --> FireFox
Anything else in the registry might work as well.
Try Ctrl+f and type the weburl of that site, sign.1li.info for your example.
delete any value name or clear any value wind the found result.
Hope this will help you!