Word 2013 high cpu usage even when not editing or scrolling

Hello,

I am having a problem with Word 2013 on Win 7 x64, Intel Core 2 Duo, 4GB RAM. The problem is that Word uses approximately 20% cpu when it has focus but is idle (i.e. I've clicked in the Window but not typing). If Word does not have focus, it does not use any CPU time. This occurs for every document I've tried, including new blank documents with no text. If I start Word in safe mode (winword /safe from a Run window), Word uses approximately 2% CPU. I've tried repairing my Office 2013 installation, disabling all add-ins, disabling hardware acceleration, disabling sub-pixel rendering, and disabling animations through the widely available registry key hack, but none of these have solved the problem. Can anyone help with this issue?

Thanks!

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