> Thanks for the explanation Jay.
>
> One really strange thing is this morning the thing happened again! All the
> file extensions are visible and the tick has gone from the 'Hide File
> Extensions for Known File Types' option.
> I've run a virus check and spyware/malware check no problems - just weird
> why all of a sudden this is happening
>
> Ron
>
>
>
> "Jay Freedman" <jay.freedman[ at ]verizon.net> wrote in message
> news:uta$m$JVJHA.2084[ at ]TK2MSFTNGP06.phx.gbl...
>> Viruses, like other programs, have no trouble dealing with files whose
>> extensions are hidden from view. It's people who have trouble with them.
>> A virus can write a file named "ClickMe.doc.exe" on your disk and force
>> it to display a document icon. If all you see is "ClickMe.doc" because
>> you have the (real) extensions hidden, you're more likely to assume it's
>> safe to double-click it, expecting a document to open. In that instant,
>> whatever damage the virus writer intended is done.
>>
>> --
>> Regards,
>> Jay Freedman
>> Microsoft Word MVP FAQ:
http://word.mvps.org>> Email cannot be acknowledged; please post all follow-ups to the newsgroup
>> so all may benefit.
>>
>> Ron O'Brien wrote:
>>> That is what has happened, somehow between switching my PC off last
>>> night and turning it on again this morning the 'Hide File Extensions
>>> for Known File Types' became unticked!!!
>>>
>>> Sorry, are you saying that if I do hide file extensions, (i.e. tick
>>> that option) that creates a security issue? As I would have thought
>>> that hiding the extension would make it more difficult for a virus
>>> infection
>>> Ron
>>>
>>>
>>> "Terry Farrell" <terryfarrell[ at ]msn.com> wrote in message
>>> news:%23PE5cXJVJHA.1248[ at ]TK2MSFTNGP03.phx.gbl...
>>>> That is absolutely normal unless you enable the Hide File Extensions
>>>> for Known File Types in Explorer. However, this is a security risk
>>>> as it opens the door for a virus infection. You should not use that
>>>> option and MS should remove it.
>>>>
>>>> --
>>>> Terry Farrell - MSWord MVP
>>>>
>>>> "Ron O'Brien" <castcall[ at ]ntlworld.com> wrote in message
>>>> news:ujjWjKJVJHA.3584[ at ]TK2MSFTNGP02.phx.gbl...
>>>>> Graham,
>>>>>
>>>>> I think you may have misinterpreted my problem (probably me not
>>>>> explaining it fully).
>>>>>
>>>>> Normally when I go to open a document I have previously created I
>>>>> would go to File \ open and the open dialogue box appears with just
>>>>> the file names in for example: Document01. Now however, when that
>>>>> dialogue box appears that file is shown as: Document01.doc It is
>>>>> the same with MS Works, only files appear with the .wps visible
>>>>>
>>>>> Ron
>>
>>
>