How do i find the adware/spyware parent file infected to delete it?

i only have the free version of norton spyware scan from yahoo toolbar can somebody take me step by step

How do i find the adware/spyware parent file infected to delete it?virus protection software

鈼?Full PC security information - All in one 鈼?br>

If you think or know that you have a certain file in your computer that was infected by a spyware/adware, the only thing I would recommend is running a removal scan.

Pick one of the following programs below and let them do the work. To prevent more work than necessary I would recommend first doing an online scan for virus and spyware. There is a link below to get to scan your computer for FREE.

鈫?Scan your computer for spyware/adware using a FREE software from Microsoft called Windows Defender: 禄禄http://www.microsoft.com/athome/security...

飥啋 You can download a FREE antivirus software:

禄禄 http://www.grisoft.com/doc/Programs/lng/...

鈫?MSN Toolbar, includes Pop-up blocker, Phishing filter - FREE:

禄禄 http://toolbar.live.com/?mkt=en-us

鈫扽ahoo Toolbar with Pop-up blocker, spyware protection...FREE

禄禄 http://companion.yahoo.com/ie

鈫扜oogle toolbar:

禄禄 http://toolbar.google.com/T4/?rd=f

鈫?Scan your computer for spyware/adware:

禄禄 http://www.pctools.com/spyware-doctor/?r...

鈫?Scan your computer for virus/trojans: