Time-out events in Internet Explorer get fired multiple times when the system uptime is near 49.7 days


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This article provides information about you clicking on the webpage will cause a time-out event when the uptime of the operating system reaches a predetermined value.

Original product version:   Internet Explorer 6, Internet Explorer 7, Internet Explorer 8
Original KB number:   2655407


Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 may fire additional time-out events when you click on a webpage if the operating system uptime is approximately 49.7 days.

More information

This behavior occurs because the tickCount value of the operating system uptime, which is stored as a DWORD value in milliseconds, performs a rollover from 0xFFFFFFFF to 0x00000000 after approximately 49.7 days. If the time-out event is set to happen after the rollover, during the period of the time-out event and the rollover a click event may trigger an additional time-out event.

After the rollover has been performed, the time-out event is no longer triggered by the click event.


This behavior does not occur in Internet Explorer 9 or higher.

For more information about GetTickCount, see GetTickCount function.