Win32/PSW.Lineage.DN/ PWS-Lineage Virus

My dad's computer is telling him he has this virus on his computer. I'm not sure what to do exactly. Here's my log file. Hope you can help me out. Thanks!

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:41:29 PM, on 5/13/2009
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v7.00 (7.00.6001.18226)
Boot mode: Normal

 

I'll go ahead and give more details like I should've originally.
My dad has a computer and he's not very technologically savvy. He ran this program on Vista, "Problem Reports and Solutions", and it's telling him this:

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Virus alert: Microsoft detected the Win32/PSW.Lineage.DN/ PWS-Lineage virus on your computer

This problem was caused by Win32/PSW.Lineage.DN/ PWS-Lineage, a known computer virus.

Solution

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To prevent this problem from occurring again, install and run an up-to-date antivirus program on your computer.

Additional information

For more information about computer viruses, go online to the following Microsoft website:

Protect your computer: Beyond the basics

To keep yourself informed of the latest security issues, go online to the Microsoft Security website:

Microsoft Security

To see a list of Microsoft and third-party solutions for spyware, adware, and viruses, go to the following webpage online:

Security software: Downloads and trials

Tip
You can avoid this and many other errors by running Automatic Update and running an up-to-date antivirus application. Automatic Update keeps your computer up to date and secure by notifying you as soon as updates become available.
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I have no idea what he was doing or even how he came across this. I ran all the scans from the Malware FAQS and nothing came up. For all I know he may actually have nothing. Anyway, he's bugging the crap out of me so I would appreciate any help. Thanks

I've attached all the logs that I was told to by the Malware FAQ.