|stack overflow means a program executed and then crashed. A stack is a collection of temporary holding cells. Something went to its cell and then happened to fill another.. or more.|
Look at your event viewer logs for clues to the program causing the problem.
Clues are recently installed programs, recent modifications to the system, malware infection...
You can also use msconfig to limit your startup programs whereby you may be able to isolate which program is causing the issue.
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