To determine your previous version of Internet Explorer, use the
appropriate method:
Internet Explorer 5 Installed
To determine your previous version of Internet Explorer after
installing Internet Explorer 5, view the PreviousIESysFile value
under the following registry key:
Hkey_Local_Machine\Software\Microsoft\IE Setup\Setup
Value Version
---------------------
4.70.0.1155 3.0
4.70.0.1158 3.0
4.70.0.1215 3.01
4.70.0.1300 3.02
4.72.3110.3 Windows 98 Internet Explorer
Internet Explorer 4.x Installed
To determine your previous version of Internet Explorer after installing
Internet Explorer 4.x, view the PreviousIESysFile value under the
following registry key:
Hkey_Local_Machine\Software\Microsoft\IE4\Setup
The following table lists the possible values for the PreviousIESysFile
registry value and the version of Internet Explorer that corresponds to
each:
Value Version
---------------------
4.70.0.1155 3.0
4.70.0.1158 3.0
4.70.0.1215 3.01
4.70.0.1300 3.02
: The Internet Explorer 4.0 Uninstall feature is designed to return
you to a pre-Internet Explorer 4.0 browser. As a result, the
PreviousIESysFile value cannot be used to determine if you upgraded a
version of Internet Explorer 4.0 over an earlier Beta version of Internet
Explorer 4.0 (even if you did not uninstall the earlier version).
The PreviousIESysFile value is primarily used by the Internet Explorer 4.0
uninstall program to determine which components should be removed when you
remove Internet Explorer 4.0. The registry contains a RequiredIESysFile
value for each component. If the RequiredIESysFile value for a particular
component is equal to or less than the PreviousIESysFile value, the
component is not removed when you remove Internet Explorer 4.0. If the
RequiredIESysFile value for a component is greater than the
PreviousIESysFile value, the component is removed when you remove
Internet Explorer 4.0.