Hello! Never cleaned the computer (Win XP 32 SP2 - AMD K7 1000 MHZ), only an obsolete Norton Internet Security 2005 + Norton Antivirus installed... Yesterday I installed some free antimalware utilities (lots of popups, slow navigation, etc...) and I found globally more than 500 infections!!! Some very dangerous. Initially some rootkits crashed (blue screen) the system while running AdAware full scan. I gradually removed them with some utilities freeware and then I used AdAware... But once it found the system "Clean", the new PC Tools Doctor (free version) found lots of other problems... I manually removed all the files and registry keys... but I always found some infections (less). Surfing in these forums, I found lists of files that I should delete and that I have! For example: swxcacls.exe - swsc.exe - etc... So NOW I found and I'm running the excellent "preliminary removal instructions" step by step. I totally uninstalled the Norton. I installed the beautiful COMODO Firewall PRO. Now I'm running the TREND Micro on line virus scanner, but I ALREADY have installed (last night) the HJT latest version, the Super Anti Spyware Home Free (latest version), the Ad-Aware 2007 (latest version). These are my questions: 1) Should I uninstall them, re-download and re-install again? or are the installed ones good? (I disabled all the real time monitoring programs). 2) I have already installed in my system the AVG Antivirus 7.0. It is updated. Now there is the 8.0. What should I do? should I uninstall the 7.0 (but it is live-updated) and install the 8.0, or is it good the 7.0? 3) In the first case, should I re-make the TREND Micro on line virus scanning of my system? Should I uninstall the COMODO Firewall Pro, then install the AVG 8.0 and then re-install the COMODO Firewall Pro (to let me follow your step-by-step instructions), or may I leave it installed while installing the AVG 8.0 if necessary? MOST IMPORTANT: 4) "Step 14": "Run AVG AntiSpyware".... But it does not exist yet! I read in your yesterday reply: * Many, many changes before writing this. * Step 6, contributed by Blind Dragon. Updated AVG AS for SuperAntiSpyware OR Malwarebytes' Anti-Malware. And I already installed the SuperAntiSpyware; but what about the AVG AS log file that you want me to attach here? Should I use the Anti Spyware capabilities of the new AVG 8.0 and attach its log (if it makes a log!), or should I attach the Super AS log in place of the AVG AS log? Thank you very much - yours is a great work!