Alert! Be on the lookout for "sthhcrooxea", it is an IE Toobar distributed with MSN Messenger Plus as an optional component. How did I get it? Dan, my brother, unexpectedly and unknownly installed it on one of our computers which was part of the MSN Messenger Plus setup routine that installed a Search bar in Internet Explorer and pops up ads every once in awhile. Anyways, the file is called "prjgroasheap.dll" and the CLSID code is "1f1562db-d22a-4fb3-b643-39bdf53b00f7". Anyways, I removed it with the help of HyjackThis.