It looks like PC tools firewall has something like Spybot built in.
This is not true. PCT FW is just a FW only unless you installed a suite.
First, did you uninstall SB and TT with the uninstaller tools I posted previously, then reboot?
Second, when you uninstalled PCT FW, did you do it as the vendor suggested then reboot? BTW, PCT leaves a LOT of remnants behind. I highly suggest you go into Safe Mode > Advanced Search > type in PC Tools (and on other searches type: PCTools, Symantec, Norton) > anything that comes up on the right side of your screen if you are not sure if it is related to PCT you can right-click on the file for "Properties" to confirm. If it is related to PCT, you can delete it and put it in the recycle bin and empty while in Safe Mode. Since PCT is owned by Symantec/Norton, that is why you also need to search under these names as well, and they are known to leave remnants and a search or uninstalling this FW has shown to leave registry or drivers behind which may cause issues with other security software. Did you reboot after uninstallation?
Turn on your Windows Firewall in XP for now so you have some kind of protection. Eventually you will need a third-party 2-way FW like Avast IS; Online Armor (free or paid); Comodo (without AV); Outpost (free or paid) - these have not caused conflict with Avast.
Third, when you installed Avast, did you do so using the new Avast Uninstaller tool and uninstall ALL previous versions and products of Avast prior to re-installing? This third step should be the LAST step after uninstalling all your other software and cleaning your machine.
Here are the steps for uninstalling Avast and doing a clean install (leave the Avast settings at default for now):
1. Save a copy of Avast and save it to your HDD:
http://www.avast.com/download-software – all versions
2. Download the Avast Uninstall Utility
http://files.avast.com/files/eng/aswclear6.exe and save it to your HDD.
3. Disconnect from the Internet at this time.
4. Go to Control Panel and uninstall Avast through Add/Remove Programs if possible and reboot.
5. If Step 4 fails, boot into
Safe Mode (hit F8 repeatedly) and run the Avast Uninstall Tool.
Uninstall ALL previous versions and products of Avast at this time.
6.
Reboot.
7. Install the newest version of Avast and
reboot.
8. Get Internet access and register your copy for Free:
Free –
http://www.avast.com/registration-free-antivirus.php9. Update the Avast definitions.
Let us know how this works for you. Thank you.