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1Press "Ctrl" + "Alt" + "Delete" and click on "Start Task Manager. The Windows Task Manager opens.
2Click on the "Processes" tab and then click "Show Processes From All Users."
3Right-click on "mouse.exe" and select "End Process." Close the Windows Task Manager.
4Click on the "Start" menu and type "mouse.exe" into the "Search Programs and Files" box.
5Right-click on the "Mouse.exe" file that appears in the results list and select "Delete."
6Restart your computer.
http://www.ehow.com/how_6812267_fix-mouse-virus.html
It's likely to be set up as a Runas CMD in the registry.
Look here
[HKEY_CLASSES_ROOT\*\shell\runas\command]
and here
[HKEY_CLASSES_ROOT\Directory\shell\runas\command]
BUT check as far back as the previous tree-branch to be sure
[HKEY_CLASSES_ROOT\*\shell\runas\]
and here
[HKEY_CLASSES_ROOT\Directory\shell\runas\]
Right click and export before you delete anything, this will create a registry merge file to put it back should you delete the wrong thing.
http://www.sevenforums.com/customizatio ... virus.html