Unable to install voicechat plugin update. Could KB891711 be involved?

Microsoft Windows 98

I subscribe to a chat service which includes a voice chat function
called UniVoice. In the past, updates have installed into Downloaded
Program Files, with associated registry entries.

But now, the files for the new version, including a CAB file, appear
to download ok into Temporary Internet Files, but only a couple
files from the CAB end up being transferred into downlo~1.

I have no firewall or realtime virus checker, and nothing else
running. The only thing I can think of that's changed is the
Windows Update stuff, and just wondered if something there might
explain this - something that used to work that's no longer
permitted. The update is all happening under IE5.5, and is supposed
to happen automatically.

I'm still running IE 5.5 SP2 under 98SE.

I've emailed the service, but haven't gotten a meaningful response
yet.

Any ideas?
the update may require IE6 SP1, it is years sinceIE5.5 was current
the non existent av & firewall could be the problem

--
Adaware http://www.lavasoft.de
spybot http://security.kolla.de
AVG free antivirus http://www.grisoft.com
Etrust/Vet/CA.online Antivirus scan
http://www3.ca.com/securityadvisor/virusinfo/scan.aspx
Panda online AntiVirus scan http://www.pandasoftware.com/ActiveScan/
Catalog of removal tools (1)
http://www.pandasoftware.com/download/utilities/
Catalog of removal tools (2)
http://www3.ca.com/securityadvisor/newsinfo/collateral.aspx?CID=40387
Blocking Unwanted Parasites with a Hosts file
http://mvps.org/winhelp2002/hosts.htm
links provided as a courtesy, read all instructions on the pages before use

Grateful thanks to the authors and webmasters
_
| I subscribe to a chat service which includes a voice chat function
| called UniVoice. In the past, updates have installed into Downloaded
| Program Files, with associated registry entries.
|
| But now, the files for the new version, including a CAB file, appear
| to download ok into Temporary Internet Files, but only a couple
| files from the CAB end up being transferred into downlo~1.
|
| I have no firewall or realtime virus checker, and nothing else
| running. The only thing I can think of that's changed is the
| Windows Update stuff, and just wondered if something there might
| explain this - something that used to work that's no longer
| permitted. The update is all happening under IE5.5, and is supposed
| to happen automatically.
|
| I'm still running IE 5.5 SP2 under 98SE.
|
| I've emailed the service, but haven't gotten a meaningful response
| yet.
|
| Any ideas?
|