I have no add-ons and toolbars installed.
BTW. People say ,in XP & Win2003, reinstalling IE7 can fix this problem. But
I cannot do this, 'cause I am using Vista Ultimate. There is no corresponding
IE7 Download for Vista, supplied by MS.

"tony" wrote:

> It is Windows Vista Ultimate Edition.
>
> "tony" wrote:
>
> > I have been running Internet Explorer 7.0 on Windows Vista for several
> > months and it was working fine. But today I just installed the "Security
> > Update for Windows Internet Explorer 7 (KB931768)" and that caused IE7 to
> > stop working.
> >
> > After I installed the update and restarted Windows, IE7 will no longer
> > start. Now when I double-click the icon or run iexplore.exe, the web browser
> > window flashes quickly on the screen and then disappears. Then this error
> > message dialog box appears.
> >
> > ----------------------------------------------------------------------
> > File Download - Security Warning
> > Do you want to save this file?
> > Name: navcancl
> > Type: Unknown File Type, 2.64KB
> > From: ieframe.dll
> > Save Cancel
> > ----------------------------------------------------------------------
> >
> > temporarily, I have three ways to fix it:
> > 1. retore Vista or uninstall the patch
> > 2. run IE as Administrator ( which, as a matter of fact, disable the
> > protection mode)
> > 3. in IE Options->Securities->disable Protection Mode.