trojan virus are very dangerous viruses and attacks different files on your computer and they are besically gotten from the internet.
A Trojan horse appears to be nothing more than an interesting computer program or file, The Trojan virus once on your computer, does not reproduce, but instead makes your computer vulnerable to malicious attacks by allowing them to access and read your files. This makes the virus extremely dangerous to your computer. This virus can be minimized when you avoid downloading unnecessary files and software's, and only download software's and files that you are sure of. This virus is an application that is installed in your computer and it adds itself to all user favorite folder and the current user favourite folder. Also it is in you program files.
If you want to remove this virus, you have to be very careful and use your common sense, for you to find it. So you have to try and identify one name that the virus uses, then use that name to get every other name that it may also be using to run.
Open my computer, double click drive C: double click document and settings, double click all users, and open my favourite folder look for the name of the virus. It might be virus scan.com. Select all the files related to virus scan.com and delete them. Do the same for all the user accounts in that computer. Also, look for the virus in your user account application data. Open document and settings and double click on all users , open application data also look for the virus there if you find it delete it and do same for all the other user account
Secondly click start, click run and type Regedit. Registry editor will open. Click the minus button beside my computer to close the tree view such that the registry editor looks like the one below. Click edit menu and click find in the menu. On the find box, type the name of the virus in the search box and press find next. You will see the registry file by the right pane. Make sure that it is the right file else do not delete because if you delete what you are not sure of you may delete an important registry entry that may cause crash of data lose. So make sure the file you are about to delete is name that the virus uses to run.
Make the search again until you have removed all the registry entries related to the virus. Download no adware from http://www.noadware.net
and install it. Update the application and Use it to scan your computer, you will see all the viruses, their location, where they are installed on your computer. Because you are using a trial version, you will not be able to remove the viruses. Look at the items, their location, type, danger rate. For all the items that show severe, open the location shown in the location field and delete the files, e.g. C:\Documents and Settings\netways ltd\Application Data\antivirus scan.com. Do so for all other files that are flagged dangerous. Then rescan your computer again with NoAdware you will notice that items that you have remove manually will not be displayed again.
Furthermore click start, control panel double click add and remove program in the control panel. When the add and remove program window opens look for installed application relating to that virus, if you see any one uninstall it.
to read the full details with screen shorts visit http://online-computer-repairs.blogspot.com/2008/12/how-to-remove-desktop-virus.html