Ensuring I Have A Clean Computer

I have an inherited Inspiron 6000 with Windows XP Professional, version 2002, Service Pack 3, Pentium M processor, 1 GB RAM.

I tried to connect the computer to a network printer, but received error message that it couldn't talk to the internet. Research said problem is the firewall. I disabled the firewall, but no change. More research said may be a virus. So, since it was a used computer, I needed to excise any lingering maleware also. So I started the "Windows XP Malware Removal/Cleaning Procedure." I downloaded the tools on one computer and transferred them via thumb drive to this computer.I followed the instructions closely, and it seems to have helped. I can access the internet now.
Now I would like to ensure there is no lingering maleware on this computer.
The requested logs in step 3 of the procedure are attached.