>I've had the problem when I was testing a method to put a grid in Excel. There were many exec.exe's during the test.
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>Have look with the taskmanager and sort the processes in ascending/descending sequence. How many Winword.exe's are there ?
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>Kill them all and see whether it fixes the problem. I'm not sure that is the cause, but it's worth trying though

It didn't help :( After I tried this command again I see one Winword in the Task Manager. I kiil it, tried again - same result. There are lots of processes running, so I may try to kill some of them...