Windows Malware Detector from SUSE 9.3

One of my co-workers has a Win2K box that has some kind of malware on it. I have run 3 windows malware detectors on it and none of them find it. A fourth simply causes the machine to be unacceptably slow. I have loaded a SuSE 9.3 dual boot config on it. Is there a SuSE 9.3 tool for searching thru his C: drive for windows malware? If not, is there something I can download and attempt fixing his machine with? Greg