>>>Have a simple program which Copies a Template Excel Spreadsheet to the Window Temp Folder, opens the Temp File via Automation, fills in a few Cells, Prints the Spreadsheet and Quits Excel. Has worked perfectly for years.
>>>
>>>All of a sudden only 2 of the 5 Cells are filling-in correctly on a couple of User's Computers (as of 12/12/14). Don't know why this is happening (both computers running Win 7/Excel 2007).
>>>
>>>Anyone else seen this happen?
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>>I have not seen this happen, but something is changed since last patch day.
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>>I fill huge amounts of cells with the array operation. Since last week this is considerable slow. Transfers that has run within minutes now need one and a half hour. Customer came up with this, so it's not only with me ...
>>
>>I run Win 8.1 / Office 2013
>
>Update: The Spreadsheet contains Text Boxes linked to Cell Values. The underlying Cells are properly updating, but the Text Boxes do not. When I go into Developer Mode in the Client's Excel 2007, notice many Properties are missing including the Linked Cell Property. Looks like something broke with last week's Windows 7 Update.

While I think it was last weeks update I think it's not the Windows, it's more the Office update. My problem has gone away without further action - but what MS is doing with the office updates is not tracable. It also seems not relate to the system recovery points (I don't know the english term for Systemwiederherstellung)