_INS0432._MP is an InstallShield program, which is only used during installs.It is usually in the %TEMP% folder.

To fix the problem:

1. Rename SystemRoot%\System32\uninst.exe to uninst.old.

2. If you have Sp3 or SP4 on CD-ROM, copy uninst.exe to SystemRoot%\System32\uninst.exe.
    (or look for uninst.exe on the third-party media)