I'm using my 2002 Dell Optiplex gX270 running Windows XP. I've pulled it apart and cleaned out all the dust and debris. I just replaced the CMOS battery and added 1gb DDRPC3200 DIMM/400Mhz of RAM. I use Comodo firewall. I also allow the Windows firewall. I regularly run Malwarebytes and Hitman Pro. I installed the latest version of Mozilla/Firefox as my browser. I use Google as the search engine. I have run the tweaking.com combo fix several times. It appears to have fixed some of the registry problems. I have run "chkdsk" from the command prompt to fix more issues.
While Malwarebytes may occasionally find an unwanted or suspicious file, Hitman consistently finds, on average, 37 tracking cookies or pup files. They all seem to originate from firefox setup files in my documents and settings.
Firefox is as good a browser as any I guess. And I am working on a non supported operating system which is obviously vulnerable to pup and adware and the like.
Before I ditch the GX270 running XP, can you offer some feedback and suggestions to enable me to optimize and enhance my current system?