Yes, two freeware applications are available that are especially effective as Spyware removal tools.
 
The first is Ad Aware.  This is available for download from: http://www.lavasoftusa.com/.  This tool provides free updates as well as boot-time scanning options.
 
The other program is SpyBot Search and Destroy, available at: http://www.safer-networking.org/.
 
Both of these applications will remove Spyware and Malware programs that may be running un-dectected by virus scan software on your workstation.