excel 2010 show all windows in the taskbar not working

When toggling this feature on or off, it does nothing. On another pc with the same version of office it behaves as expected. When opening a excel doc, it does not show in the taskbar. If I have 3 spreadsheets open, it used to show 3 files open on the taskbar. Any ideas?
Thomas LebahnHelp Desk SpecialistAsked:
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Justin AlvarezAccount ManagerCommented:
Just to confirm, you have changed the the Windows taskbar to "Never Combine"?

Task bar "Never Combine"
Thomas LebahnHelp Desk SpecialistAuthor Commented:
Yes, I have toggled those settings also. This machine had a virus infection earlier this summer, several Trojans. The system is clean now. Could this be damaged from the virus removal process? I did have to reinstall Internet Explorer to get another bug worked out after virus removal.
[ fanpages ]IT Services ConsultantCommented:
Do you log-in to the two PCs that you are using (the one that performs as expected, & the one you mentioned above that had some remedial action earlier in the year)?

If you & another colleague do have separate log-in user names/passwords, perhaps you can log-in to each other's machines using your own log-in credentials & see if the issue is PC-based, or associated with your actual log-in Profile information.

That is, if you usually log-in as "Thomas" to PC #1, & your colleague, say, "Mindy", uses PC #2 with her own log-in, please ask "Mindy" to log-in to PC #1 (as herself), & you log-in to PC #2 (as yourself).

Then you can see if the issue follows you to PC #2, or remains on PC #1.
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Thomas LebahnHelp Desk SpecialistAuthor Commented:
It is a customers machine. It has been acting up since the virus removal this summer.
[ fanpages ]IT Services ConsultantCommented:
Do you use separate log-ins to MS-Windows for each individual user?

...or, do you use one log-in for everybody that wishes to use it?
Thomas LebahnHelp Desk SpecialistAuthor Commented:
Just 1 log in for everyone.
[ fanpages ]IT Services ConsultantCommented:
In that case, we could be here for quite some time trying lots of different way to fix this one issue, only to find you have another on that same machine in the near future.

Is it practical for you to re-build the machine (i.e. re-install MS-Windows)?

Was "Windows Restore" ("System Restore") running (in the background) on the PC earlier in the year?  Can you reinstate the operating system files (only; not user data files) to a known date prior to when the issue first occurred?

[ https://support.microsoft.com/en-us/kb/306084 ] (MS-Windows XP)
[ http://windows.microsoft.com/en-gb/windows7/restore-system-files-and-settings ] (MS-Windows 7)
[ http://windows.microsoft.com/en-GB/windows-8/restore-refresh-reset-pc ] (MS-Windows 8.1)
Thomas LebahnHelp Desk SpecialistAuthor Commented:
I really don't want to put in another 5 hours reinstalling windows on this machine. But, I think at this point, that a reinstall is the best option.
[ fanpages ]IT Services ConsultantCommented:
Yes, I agree.

Somebody may well hit on a solution in five minutes time from now, but you will never know if another issue is lurking around the corner ready to drain more of your (& your colleagues') time.

Spending the five hours now may seem time you cannot afford, but given what you said about MS-Internet Explorer, I suspect other issues are there (but you just have not found them yet).

Either way, if you begin the rebuild now, & it takes five hours, if somebody proposes a solution at least you can try that the next time something of this nature occurs.

However, I take the point; you could hold-back another 24 hours to see if anybody can find a solution, if you are prepared to wait.

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