We work on a product that uses Excel, we are now testing all aspects of Excel 2013. During these tests, we seem to have encountered a problem where excel suddenly causes high CPU usage by only drawing some shapes. We have been able to minimize the problem into the following few steps: Open a new, clean workbook Draw an oval, give it a material (right-click, choose “Format Shape”, click “Effects”, “3D Format”, “Material”. Choose any material.) Duplicate the Shape four times, producing Oval2, 3, 4 and 5. Group Oval2 and 3. Group Oval 4 and 5. Press Alt-F10, in the selection window, hide the group containing Oval2 and 3. Deselect everything (!) by clicking in an empty cell. Now observe the task manager. On an I7 Windows 7 PC, Excel now runs 4 cores at around 50%. Also, OnTime functions are not being called anymore because of this rendering bug. Once you select any shape, or un-hide the hidden group, Excel becomes quiet once again. Also, the problem can be prevented from happening by removing the materials in the shapes. This bug (?) seems to happen also on most of our more complicated applications, and it would take lots of work to re-design everything not to use materials. Can anyone confirm this problem, provide a workaround?

Hi Meron, <snip> Excessive demand to the processor goes back to inappropriate level after a while. At that point, if I open any other Excel file and close it right back, the level goes down immediately. I tried everything in this thread and nothing helped. But if I open a file and then close it, all is well.

Hi everybody! Uninstalling the 3 KBs was only a temporary solution for me; Finally I decided to switch to Excel 2016; both 32-bit and 64-bit have been already tested and unfortunately the problem still persists. Would appreciate if you could possibly help me on this. Regards, Nima

Hi all, It seems that removing the "Save AutoRecover information" option cleared my problem. Just to let you know of my finding. Regards,

Hi Meron, I've tried all suggestions above and found that removing the 3 KBs appears to have fixed the issue but not completely. Excessive demand to the processor goes back to inappropriate level after a while. At that point, if I open any other Excel file and close it right back, the level goes down immediately. This is the essence of my last post. Thanks, Dan

Hi Dan Do you see Excel consuming most of the CPU resource in the "Task Manager" after uninstalling the 3 KB's? If so you can try doing the following , Open Excel only , on the File tab click options and them look for advanced Scroll down and tick the check box for "Disable hardware graphics acceleration". Go to this link or official Microsoft support on the issue & scroll down to Step 2. https://support.microsoft.com/en-us/kb/2768648 . If its not excel consuming the CPU you might have a different issue. Hope this helps you. Meron

Excel 2013 High CPU Usage

Anonymous

We work on a product that uses Excel, we are now testing all aspects of Excel 2013. During these tests, we seem to have encountered a problem where excel suddenly causes high CPU usage by only drawing some shapes. We have been able to minimize the problem into the following few steps:

Open a new, clean workbook
Draw an oval, give it a material (right-click, choose “Format Shape”, click “Effects”, “3D Format”, “Material”. Choose any material.)
Duplicate the Shape four times, producing Oval2, 3, 4 and 5.
Group Oval2 and 3. Group Oval 4 and 5.
Press Alt-F10, in the selection window, hide the group containing Oval2 and 3.
Deselect everything (!) by clicking in an empty cell.

Now observe the task manager. On an I7 Windows 7 PC, Excel now runs 4 cores at around 50%. Also, OnTime functions are not being called anymore because of this rendering bug. Once you select any shape, or un-hide the hidden group, Excel becomes quiet once again. Also, the problem can be prevented from happening by removing the materials in the shapes.

This bug (?) seems to happen also on most of our more complicated applications, and it would take lots of work to re-design everything not to use materials. Can anyone confirm this problem, provide a workaround?

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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86 answers

Anonymous

2016-05-06T21:16:55+00:00

Hi Meron,

<snip>

Excessive demand to the processor goes back to inappropriate level after a while. At that point, if I open any other Excel file and close it right back, the level goes down immediately.

I tried everything in this thread and nothing helped. But if I open a file and then close it, all is well.
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Anonymous

2016-03-26T09:12:49+00:00

Hi everybody!

Uninstalling the 3 KBs was only a temporary solution for me; Finally I decided to switch to Excel 2016; both 32-bit and 64-bit have been already tested and unfortunately the problem still persists.

Would appreciate if you could possibly help me on this.

Regards,

Nima
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Anonymous

2016-03-23T13:11:11+00:00

Hi all,

It seems that removing the "Save AutoRecover information" option cleared my problem.

Just to let you know of my finding.

Regards,
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Anonymous

2016-03-08T15:31:36+00:00

Hi Meron,

I've tried all suggestions above and found that removing the 3 KBs appears to have fixed the issue but not completely.

Excessive demand to the processor goes back to inappropriate level after a while. At that point, if I open any other Excel file and close it right back, the level goes down immediately.

This is the essence of my last post.

Thanks,

Dan
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Anonymous

2016-03-08T06:57:29+00:00

Hi Dan

Do you see Excel consuming most of the CPU resource in the "Task Manager" after uninstalling the 3 KB's?

If so you can try doing the following , Open Excel only , on the File tab click options and them look for advanced

Scroll down and tick the check box for "Disable hardware graphics acceleration".

Go to this link or official Microsoft support on the issue & scroll down to Step 2.

https://support.microsoft.com/en-us/kb/2768648.

If its not excel consuming the CPU you might have a different issue.

Hope this helps you.

Meron
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