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From: george on 11 Feb 2010 10:48
"nanren888 " <nanren888.remove.this(a)hotmail.com> wrote in message <hhgd6v$m7q$1(a)fred.mathworks.com>...
> "george " <artilogica(a)btconnect.com> wrote in message <hhg2j4$dq7$1(a)fred.mathworks.com>...

>
> george,
> Not help, but maybe info.
> I have pretty plain Win7, x64, with office products loaded.
> No such issues.
> When new, it had .mat associated with office something.
> All .mat files showed as shortcuts & would not show extensions, regardless of settings for show extensions & hide nothing.
> Folder options, or equivalent, (non-registry editing) switched it to Matlab & have noticed no ill-effects.
> Anyway, I guess that means that you are looking for something different: something in your setup.

Thanks

I stil have not resolved this problem and it is becoming a real nusiance
From: george on 12 Feb 2010 12:58
Thanks nanren888 , you points were right :
> "When new, it had .mat associated with office something.
> All .mat files showed as shortcuts & would not show extensions...."

I.e. .mat was associated to MS Access which installled a dll extension for Windows Explorer that was handling .mat as MS Access data table link file in conflict with Matlab

Using MS support forum site:
http://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/b5464736-19aa-43b9-bbff-15431c2602c2/
and their guidelines for use of ShellExView I located and disabled .mat file extension dll handler for MS Access and that solved the issue of Windows Explorer crashing on .mat files. I later re-associated the .mat with Matlab (which was not possible before as the Windows file extensino-program association utility was crashing too).
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