Screen flicker

Hi All

I have a problem with a user who when she uses excel on her computer the screen flickers, only excel is effected.  The spreadsheet doesn't contain any macros only basic formulas for cell addition etc.  Excel doesn't do it every time and if you click and hold the mouse in the spreadsheet the flickering stops until you release the mouse button, different spreadsheet also make excel flicker, these also don't contain any macros.  Her computer has been replaced with a spare one and the problem also occurs on this computer also.

From what I've read I'm thinking that this isn't excel that's causing it but then why would excel be the only app being effected?

Any ideas would be appreciated.
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WAITchapAsked:
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8ubterfug3Commented:
My first thought would be the graphics card drivers.

You may be able to narrow down the problem first by disabling hardware acceleration on the card. You can do this by following these instructions...
http://www.deskshare.com/resources/articles/dmc_turnoffhardwareacceleration.aspx

If the flickering goes away you can either leave it like that if the workstation is not used for anything graphically intensive, or you can then try to update the drivers for the video card and re-enable hardware acceleration.
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zorvek (Kevin Jones)ConsultantCommented:
It might be an Excel add-in. Try removing any found.

The easiest way to remove an unwanted add-in is to, from within Excel, choose the menu command Tools->Add-Ins. In the Add-Ins available box, clear the check box next to the add-in to unload and click OK. To remove the add-in from the menu, restart Excel.

To completely remove an unwanted add-in use the add-in manufacturer's uninstaller. Uninstallers are found in the Add or Remove Programs control panel.

Without an uninstaller, completely removing an add-in from a computer is possible but not easy. First look in all known XLSTART folders. The most common locations of these folders are:

   C:\Program Files\Microsoft Office\Office11\Xlstart
   C:\Program Files\Microsoft Office\Office10\Xlstart
   C:\Program Files\Microsoft Office\Office\Xlstart
   C:\Documents and Settings\User Name\Application Data\Microsoft\Excel\XLSTART
   C:\Winnt\Profiles\User name\Application Data\Microsoft\Excel\Xlstart
   The folder that is specified in the "At startup, open all files in" box on the General tab in the Options dialog box.

Look for any file that might be the add-in. After quiting Excel, move the targeted file to another location (do not delete it until sure it is the desired add-in.) Start Excel and confirm that the add-in is removed. If not, return the moved add-in to the original XLSTART folder and try again with another.

Some add-ins are not stored in XLSTART folders and are loaded into Excel using Registry entries. If the correct Registry entry can be found then it can be used to locate and delete the add-in. The Registry entry should also be removed but only after making a backup of the Registry and confirming that the add-in identified is the correct add-in. The most common Registry locations where add-ins are located are:

   HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Excel\Add-in Manager
   HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Excel\Options (add-ins are listed in the OPEN and OPENn entries)
   HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Excel\Add-in Manager
   HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Excel\Options (add-ins are listed in the OPEN and OPENn entries)
   HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\AddIns

Kevin
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WAITchapAuthor Commented:
Thanks for your comments, I've got other users with the issue so one lady was just having the issue, I've check the driver version and they are quite old so I'll source the latest ones I've also changed the hardware acceleration to half way on her machine, she's monitoring it and will let me know.

Will check back when I get some feedback from the users.
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8ubterfug3Commented:
Turn hardware acceleration completely off for the test.
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WAITchapAuthor Commented:
User hasn't had the issue since I've turned down the hardware acceleration.  The other users also haven't reported the issue (but I haven't done anything on there computes) so I'm waiting just to see if turning down the hardware fixes it.  I'll check with the guinea pig today and let you all's know.

Thanks again for your help.
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WAITchapAuthor Commented:
All the users that where having the problem haven't reported having the issue lately, you've both given me some good ideas that I'll persue if the problem crops up again.

Think I'll split this one down the middle.

Thanks.
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