I wish I was better able to answer your question, other than to state what I have done myself.
Firewall: XP SP2 native firewall
Active anti-malware: Microsoft Windows Defender (free)
Active anti-virus: Eset NOD32
Active anti-malware monitors:
. Commodo BOClean (free):
http://www.nsclean.com/boclean.html
. Spyware Blaster (free):
http://www.javacoolsoftware.com/spywareblaster.html
On-Demand Scanners
These are software and web-based scanners I manually update and scan with on a regular basis; and certainly if I suspect a problem. I would have ready all of them:
Ad-Aware
SpyBot Search and Destroy
AVG Anti-malware (Download and use the trial. When it expires configure as an on-Demand scanner)
[*]
On-line Scanners:
When in doubt I always run a Panda ActiveScan, and an online scan by Kaspersky. BitDefender is another good choice. Listing:
http://windowsxp.mvps.org/Scanners.htm
[*] AVG Antispyware
Download & install the latest version of AVG Anti-Spyware (AVG AS) from
http://www.ewido.net/en/download/
* After downloading, double click on the file to launch the install process.
* Choose a language, click "
OK" and then click "
Next".
* Read the "
License Agreement" and click "
I Agree".
* Accept default installation path: C:\Program Files\Grisoft\AVG Anti-Spyware 7.5, click "
Next", then click "
Install".
* After setup completes, click "
Finish" to start the program automatically or launch AVG Anti-Spyware by double-clicking its icon on your desktop or in the system tray.
* The main "
Status" menu will appear. Select "
Change state" to inactivate '
Resident Shield' and '
Automatic Updates'.
* Then right click on AVG Anti-Spyware in the system tray and
uncheck "
Start with Windows".
*
Start > Run > type in
services.msc > [OK]- Click the "Extended tab" and scroll down the list to find AVG Anti-Spyware guard.
- Scroll down to AVG Anti-Spyware 4.5 guard > Right-click on it > Properties > Startup Type > Select Manual; Status > Select Stop > OK your way out and close the Services window.
* Select the "
Update" button and click "
Start update". Wait until you see the "
Update succesfull message. If you are having problems with the updater, manually update with the
AVG Anti-Spyware Full database installer from
here.
* Every scan, check that the definitions are up-to-date as the first step.
Scan with AVG Anti-Spyware as follows:* Launch AVG Anti-Spyware, click on the "
Scanner" button and choose the "
Settings" tab.
- Under "How to act?", click on "Recommended actions" and choose "Quarantine" to set default action for detected malware.
- Under "How to Scan?", "Possibly unwanted software", and What to Scan?" leave all the default settings.
- Under "Reports" select "Automatically generate report after every scan" and UNcheck "Only if threats were found".
* Click the "
Scan" tab to return to scanning options.
* Click "
Complete System Scan" to start.
* When the scan has finished you will be presented with a list of infected objects found. Click "
Apply all actions" to place the files in Quarantine.