What is the name and version of the old av program you are trying to remove, and how did you try to remove it - just Ccleaner or did you look in add/remove programs in the control panel or look in your programs menu to see if the program was listed and if so did it have its own uninstaller? You should have only one resident, working anti-virus program at a time. Using more than one will conflict, give false positives and make the av program ineffective.
I recommend that you (as a non-expert at the registry), never, never, never!
use any registry cleaner again or any programs that modify or alter the registry unless you are being supervised by someone expert at the registry who directs you to do so. (even one like Ccleaner which has the reputation of being one of the safer ones, but even it will allow you to make a mistake and alter the registry to the point that you would require a Windows Installation disk and a lot of expertise to repair the damage)
The one exception to this would be the Microsoft Windows One Care Safety Scan, because it relies on the expertise in registry of the Microsoft engineers who wrote it, and not on any input requiring a choice from you. Any mistake you made modifying the registry using any other program could render your computer totally inoperative.
Have you removed the trojan at this point?
What did you use to do that?
In order for an av program to be at all effective it must have its definition files updated on a regular basis. Most if not all major av programs can and should be set to do this automatically.
The first order of business would be to run the Windows One Care Free Scan
Go to Windows Live Onecare Free Scan (using Windows Explorer only)
It will say "Get a free PC safety scan"http://safety.live.com/site/en-us/default.htm
Make sure you click "Full Service Scan"
in the middle of the page and not the "Try It Now Free" on the right side.
Allow it to download the Active X components.
Choose "Complete Scan" in the window that opens
Do not click on anything else that offers you a free trial or to sign up if you live in the US.
Allow it to scan - it may take quite, maybe two hours or so depending on how big your hard drive is and how fragmented your registry and drive are.
After it completes, reboot the computer.
Then look in add/remove programs and see if the old av program is listed. If it is, use the add/remove programs utility to remove it.
If the uninstallation is successful, reboot and continue:
Make sure your current resident av program is operating properly. Update it manually and perform a complete system scan (on all partitions and hard drives).
Make sure it is set to update automatically at least once a day.
Which current AV program do you have installed?
In order to be effective (or even work at all) it must be current and kept updated. If you let it expire it is the same as not having one at all.
If you have any problems with any of the above, post back here and we will sort out whatever problems you experience.
What other anti-spyware and anti-malware programs do you have installed on your computer? We need to make sure the trojan has been removed, because if not completely removed it can regenerate, reinstall itself and reinfect your computer.
At the very least here are three freeware anti-malware programs that I recommend you download, install, update definitions and then run.
(you should run these once a week or so or whenever you think you might have downloaded something nefarious or been infected by an accidental download.
Ad-Aware SE Personal - freeware http://fileforum.betanews.com/detail/Adawa...nal/965718306/1
(Update – Aug 2006 - Spybot by default now ignores certain products such as New.Net and Sidestep for no good reason. New.Net compromises the WinSock stack by routing all your DNS queries through the NewDotNet.DLL. To enable detection go to "Settings", "Ignore products", "All products" Tab, right click on "Product", left-click on "Deselect all". Once you do that it will return to being one of the best anti-malware programs available)http://www.safer-networking.org/en/index.html
Be sure to enable “Teatimer” which gives you realtime protection (monitoring) against malware invasion.
Microsoft Windows Defender
Windows Defender will give you an additional tool in your control panel named Software Explorer which is excellent for examining software installed on your computer, its startup menu, etc which will help you identify what it is.http://www.microsoft.com/athome/security/s...re/default.mspx
This also provides realtime monitoring protection.
Do you have a two-way firewall installed or are you just using the ineffective one-way Windows XP firewall that came with XP?
If what you are using is the Windows firewall, I suggest that you download one of the following two-way firewalls. Software firewalls with freeware versions
(Run only one and disable the ineffective Windows XP firewall)
ZoneAlarm (freeware) V. 6.5.722http://www.download.com/ZoneAlarm/3000-10435_4-10039884.html
(you can have only one software firewall running. More than one will conflict)
Comodo firewall (freeware)http://www.personalfirewall.comodo.com/
There are a few others available too, but the two I linked are both good, so pick one or the other. I personally have ZoneAlarm and recommend it highly. Do not succumb to their attempts to upgrade you to any of their paid versions - if you use the other anti-malware aps I recommended you will already have the capabilities of everything you need that their paid versions have.
Zone-alarm will automatically disable the Windows firewall when you install it. I am not sure if the others do, but you should have only one software firewall working or they will conflict with each other.
Edited by Enthusiast, 02 December 2006 - 08:03 PM.