Congratulations, you've got spyware! :mad:
That file is part of the WinTools spyware package. Links in the following Google search for " WTOOLSA.EXE" will give you more information and removal instructions:
http://www.google.com/search?hl=en&lr=&ie=UTF-8&q=WTOOLSA.EXE+wintools&btnG=Search
I'm moving this to our Security forum. Read through the post there to learn even more about spyware/adware/hijack problems and how to rid yourself of them.