Your scanner presumably deleted it and rightly so.
Use this Swen fix to restore the .exe association:
http://a64.g.akamai.net/7/64/2015/2003-09-25-15-/download.nai.com/products/mcafe
e-avert/fixswen.inf
(download, right-click, select Install)
...Alan

Signature
Alan Edwards, MS MVP W95/98 Systems
http://dts-l.org/index.html
In microsoft.public.win95.general.discussion, "Bert"
<anonymous@discussions.microsoft.com> wrote:
>A virus scanner found that "iobup.exe" was suspect and it
>claims to have healed it. However, the system can't find
>this file anymore and all applications I want to start
>complain about it.
>What happened and how can I repair it?