Hice todo lo que me indicastes
scane con ewido y me reporta lo sgte:
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ewido anti-spyware online scanner
http://www.ewido.net
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Name: TrackingCookie.Yieldmanager
Path: C:\Documents and Settings\Mariela Clavel\Cookies\mariela clavel@ad.yieldmanager[2].txt
Risk: Medium

Name: TrackingCookie.Atdmt
Path: C:\Documents and Settings\Mariela Clavel\Cookies\mariela clavel@atdmt[2].txt
Risk: Medium

Name: TrackingCookie.Doubleclick
Path: C:\Documents and Settings\Mariela Clavel\Cookies\mariela clavel@doubleclick[1].txt
Risk: Medium

Name: TrackingCookie.Webtrendslive
Path: C:\Documents and Settings\Mariela Clavel\Cookies\mariela clavel@statse.webtrendslive[2].txt
Risk: Medium

Name: Downloader.Zlob.aqk
Path: C:\Program Files\HJT\backups\backup-20061023-085730-223.dll
Risk: High

Name: Not-A-Virus.Downloader.Win32.WinFixer.l
Path: C:\WINDOWS\Downloaded Program Files\USDR6Y_0001_D18M3107NetInstaller.exe
Risk: Low