Run them one at a time. With Ad-Aware you may have it
generally clean whatever it finds. The same applies for CWShredder.
Spybot S&D requires special attention (listed below), as does HijackThis
(Only more so. Details listed below) The programs are listed in order of
their general strength, safety, and purpose. It is perhaps best to install
and run these in this order of appearance. All are freeware programs,
but if you are pleased with the results and quality of the utilities,
donations to the respective Authors are cheerfully accepted.
*Most important* - Before you try to remove spyware using any of the
following programs, realize that the process of cleaning and removing
certain spyware and malware may possibly interrupt and kill your internet
connection.
Therefore, you should obtain a copy of LSPFIX, which will then make it
possible for you to re-establish your internet connection should it be
terminated.
Download LSPFIX from either of the following sites:
http://www.cexx.org/lspfix.htm
http://www.spychecker.com/program/winsockxpfix.html (For Win2k or XP)