dumprep.exe 100% CPU...

If dumpprep.exe process is using 100% of your CPU just simply read this:

dumprep.exe is (or should be) a legitimate Microsoft program, one that runs when a program has a critical error and cannot be restored.

Process File: dumprep or dumprep.exe

Process Name: Dump Reporting Tool

Description: Microsoft provided Windows Error Dump Reporting Tool that creates memory dump reports that you can send back to Microsoft for further analysis.

The tool is found on Windows XP/2003.

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To fix this problem simply turn off your systems "error reporting".

First check with Task Manager if dumprep.exe is running - if it is stop the process.

Then:

Start > Control Panel > System > Advanced > Error Reporting > select "Disable error reporting"

Problem solvered :)

REF: http://forums.whirlpool.net.au/archive/596370