Norton bundles, while having a decent firewall are notorious resource hogs.
Zonealarm SE freeware will do a more than adaquate job as it protects against incoming and outgoing threats, and one of the freeware AV programs such as AVG will do a good job without hogging system resourses.
You obviously have a trojan sending contaminated emails to everyone in your address book, and even worse, your computer may have been turned into a zombie. If you have a telephone line connected to the computer I would disconnect it immediately as you may also have phone homes that will dial 900 numbers and run your phone bill up to unbelievable amounts (and yes, you will be legally responsible for the bills)
Notify everyone in your address book that you have a trojan infection and not to open attachments sent from your computer.
When you reinstalled Windows did you immediately update to SP1 and/or SP2 (whatever's applicable)? If you did not, even the puny Windows firewall was not on by default until SP2 was installed, and your unpatched system was susceptable to myriads of exploits that the security patches in the MS Critical updates fixed.
Unfortunately, until you completely clean the infections you cannot just download SP2 as you will have numerous system problems if you do.
Since you just reloaded the op system the best way to clean it may well be to reformat it again and do another fresh install.
Once you do it, and before you connect to the internet, enable the puny Windows Firewall and if you have Norton on a disk install it. Update the latest virus definitions immediately upon connecting to the internet, then go to Windows Updates and set it to download and install all updates automatically making sure you get the Microsoft Critical Updates immediately, then download ZoneAlarm SE or one of the several other freeware two way firewalls that are available, enable it and then disable XP's firewall.
You should also download, install and update a variety of anti-malware aps starting with AdAware SE Personal (the freeware version is sufficient), Spybot Search and Destroy (enabling Teatimer which provides real time protection against unwanted registry changes and hijackers, and don't forget to "immunize" your computer after you update Spybot), and the new anti-malware ap from Microsoft - Windows Defender which also provides realtime protection.Anti-malware freeware
(You can run as many of these as you wish. Generally there is no conflict between these and you should always run several)
Ad-Aware SE Personal is a free version and it can be downloaded from their Mirror Sites in the Download section at Lavasoft websites. http://www.lavasoft.com/
Click on Adaware SE Personal in “Products” on the left side of the page
Spybot S&D: http://www.safer-networking.org/en/index.html
Be sure to enable “Teatimer” which gives you realtime protection.
Microsoft Windows Defender http://www.microsoft.com/athome/security/s...re/default.mspx
This also provides realtime protection.
Microsoft Malicious Software Removal Tool (Win XP and Win 2000):http://www.microsoft.com/security/malwareremove/default.mspx
AČ - Free from http://www.majorgeeks.com/download4281.html
. Run it, click Search for Updates, then click Scan.
Some web based scanners to put in your "favorites" should you need them:Web based online Antivirus and anti-malware scans:
(these can be run regardless of whatever else you are using. You must use Internet Explorer to run these or download the Active X addon in Firefox.)
Kaspersky Anti-Virus Web Scannerhttp://www.kaspersky.com/service?chapter=161739400#betatest
Panda Activescan http://www.pandasoftware.com/activescan/co...n_principal.htm
Trend Micro antivirus European Edition (supports Mozilla based browsers)http://uk.trendmicro-europe.com/consumer/h...call_launch.php
Etrust Anti-virus web scannerhttp://www3.ca.com/securityadvisor/virusinfo/scan.aspx
online trojan scans here - http://scan.sygatetech.com/pretrojanscan.html
Windows Security Trojanscanhttp://windowsecurity.com/trojanscan
See instructions for it here:http://www.windowsecurity.com/trojanscan/trojanscan.asp
Edited by Enthusiast, 25 February 2006 - 01:16 AM.