I don't understand why this is always such a big problem for people. First of all, the tools for removal today are just awesome. Secondly, I have had probably one major bout with trojans personally (years ago). After I finally got it solved, I downloaded FF (and never used ie again), removed every last bit of Norton from my system, installed AVG, disabled Windows Messenger, never installed another toolbar outside of Google's and also installed what has now been bought by MS and become Windows Defender today. And I have never had another issue, really. I have had a few warnings, but AVG and Defender make pretty light work of it.
Now I use Chrome, AVG and do periodic scans with Malwarebytes and never really find anything on my system at all.
But for those who do have problems, there is golden advice in this thread. There is no use trying to live with a crapped up computer. When I fix people's computers these days, I just have a USB drive with CCleaner, AVG and MalwarebytesAM on it.
1 - I will usually first disable any network card.
2 - Then I root out all traces of Norton/Symantec from the system (with permission, of course).
3 - Then I run CCleaner to get rid of all useless clutter and registries.
4 - Then I run a quick scan with MAM.
5 - Re-boot into safe mode and run a full scan.
6 - Then reboot normally and run another scan. I have never had anything else pop up at this point. (But if you do, from what others have said in here, Combofix might be able to finish the problem off. But always reboot and scan with whatever you are using again afterwards to make sure nothing is re-installed.)
7 - Then I install AVG Free (Avast! is a good one as well). During install, it will want to connect to it's servers online, so you'll need to enable the network again.
8 - Hide all traces of ie and use Chrome from now on.
[quote name='QiG']Yeah that's a nasty little one. I picked up my first major virus last month (almost 20 years of jacking around on PCs with no major problems and then POW). One of the symptoms was the search engine meddling and I couldn't download/install anti-virus/malware programs. I ended up formatting the HDD and reinstalling XP SP2 and I don't know if there are still residual effects or if my XP cd was fux0r3d because certain windows features are missing/still don't work right. (No calculator, paint, etc)[/QUOTE]
Are you sure they don't exist? I have seen that happen before. You probably just need to find the program and add the shortcuts to the Accessories tab manually. It's been a long time since I have used XP, but I believe if you type the commands "calc" or "mspaint" into the run box, it should pull up the programs. But on a much more important note, why are you still on XP?
[quote name='Malik112099']Slap yourself. Hard.[/QUOTE]
Seriously. I was only waiting to get a new HDD before I upgraded. I ordered the HDD last week. I bought Windows 7 Pro when it showed up this week. Today I wonder why I waited. Goodbye noisy computer, goodbye slow OS, hello available processes and RAM. Windows 7 is amazing.