We had this shocking problem yesterday on several machines with Excel 2007.
Rollback of security updates for the office one by one, we determined that this was caused by the update KB2596927
from December 9, 2014 - Link
After this update, not only many worksheets with a macroblock broke when activating macros due to their destruction of ActiveX controls, but also no classic ActiveX controls (button, checkbox, etc.) could be inserted into an empty book anymore!
CONFIRM AS SOLVED: I can confirm that the response to deleting the file C:\Users\USERNAME\AppData\Local\Temp\Excel8.0\MSForms.exd
worked for me!
Thanks guys!
More about EXD files
This was also permitted in another post on this forum.
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