There usually 2 switches. -k is a kernel fault check and -u is a user fault check. Since Microsoft mentioned that dumprep.exe is a non-essential system process, we can disable it. To disable dumprep.exe from startup, to
Control Panel > System > Advanced tab > click Settings button for Startup and Recovery. At write debugging information, click the drop down menu, select (none) and click OK.

Next, click the Error Reporting button, and select “Disable error reporting“. You can leave the option “But notify me when critical errors occur” checked. Click OK to close Error Reporting window.

Go to Run and type msconfig. Check if dumprep.exe still exist in the list or not. If it is there, run regedit and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run. Select KernelFaultCheck name and hit delete. Restart your computer.
Alternatively you can disable any programs that start automatically by using msconfig.
http://www.pacs-portal.co.uk/startup_content.php
Let me know if it works...