I have some good news for you guys, I've been searching about virus scanner because my PC have trouble with virus. You want to know what it's good news? just take it out buddy... I've write this article from davecomputertips.com.
Sometimes, a virus or spyware infection just won't go away using the normal antivirus/antispyware tools. The criminals who perpetrate this junk are making it ever more stealthy and do everything they can to prevent detection. Unless you can isolate the infection and prevent it from running the way the cracker wants it to, you're out of luck. For instance, if you've seen this page, you're on the verge of major problems:
Agree to install this program, and you're pretty well hosed. One client of mine who installed this program was sending out 10,000 spam emails per hour without his knowldege because he got infected with a spambot program. Suddenly, his legitimate messages were being blocked by every business contact. My client was blacklisted. He had no idea what happened. It took me a week—and cost the client nearly a thousand dollars-- to clean it up. Beware, there are others out there that do the same thing.
It's hard to get rid of some of these infections if when they're already running, which they will be if you've booted into your OS. This means that you have to have a way to start the PC in a mode that lets you scan the hard drive without the operating system running on it. The best way to do this is to boot to a CD or thumb drive that runs its own operating system. I chose the AntiVir Rescue CD from Avira for my latest incarnation of the thumb drive virus scanner. Since it runs under Linux, it has native NTFS read/write support making it unnecessary to use any third party tools like NTFS4DOS. Here's how to be up and running with your own copy of my latest tool in just a few minutes (I've made it easy by providing everything you need except the rescue CD image):
Download BLTDVS_toolkit.zip from DCT.
Extract the folder to the root of your hard drive. Download the latest version of the AntiVir Rescue CD ISO image (approx. 60 MB), saving it or moving it into the BLTDVS_toolkit folder.
Plug in your thumb drive.
Open the BLTDVS_toolkit folder and navigate to the DriveKey folder.
Run HPUSBF.EXE (command line version) or HPUSBW.EXE (windows version) and format your thumb drive using FAT or FAT32. Uncheck the "Create a DOS startup disk" option.
Copy or move the contents of the BLTDVS_toolkit folder to your thumb drive. Don't move the actual folder.
On your thumb drive, double-click avrescd.bat. This will extract the necessary files from the ISO image to your thumb drive. Be sure you specify the right drive letter for your thumb drive. - See CAUTION below!
Once the files have been extracted, makeboot.bat will be called automatically. See the caution in the next step!
CAUTION! - This step is dangerous! Heed the warning message. Please verify the correct flash drive letter is being displayed before proceeding. Do not run this file on your hard drive or your current MBR will be overwritten rendering Windows unbootable. (This isn't a complete disaster, but it takes some geeky knowledge to fix it.)
NOTE: If you are using Vista, you may see a "failure to update the MBR" error. In this case, right-click the file and specify "Run as administrator."
Hit any key to exit
You now have bootable Linux thumb drive virus scanner that will handle Windows NTFS drives as well as most other formats!
Source : http://www.davescomputertips.com/articles/security/how_to_create_a_bootable_virus_scanner.php
Sometimes, a virus or spyware infection just won't go away using the normal antivirus/antispyware tools. The criminals who perpetrate this junk are making it ever more stealthy and do everything they can to prevent detection. Unless you can isolate the infection and prevent it from running the way the cracker wants it to, you're out of luck. For instance, if you've seen this page, you're on the verge of major problems:
Agree to install this program, and you're pretty well hosed. One client of mine who installed this program was sending out 10,000 spam emails per hour without his knowldege because he got infected with a spambot program. Suddenly, his legitimate messages were being blocked by every business contact. My client was blacklisted. He had no idea what happened. It took me a week—and cost the client nearly a thousand dollars-- to clean it up. Beware, there are others out there that do the same thing.
It's hard to get rid of some of these infections if when they're already running, which they will be if you've booted into your OS. This means that you have to have a way to start the PC in a mode that lets you scan the hard drive without the operating system running on it. The best way to do this is to boot to a CD or thumb drive that runs its own operating system. I chose the AntiVir Rescue CD from Avira for my latest incarnation of the thumb drive virus scanner. Since it runs under Linux, it has native NTFS read/write support making it unnecessary to use any third party tools like NTFS4DOS. Here's how to be up and running with your own copy of my latest tool in just a few minutes (I've made it easy by providing everything you need except the rescue CD image):
CAUTION! - This step is dangerous! Heed the warning message. Please verify the correct flash drive letter is being displayed before proceeding. Do not run this file on your hard drive or your current MBR will be overwritten rendering Windows unbootable. (This isn't a complete disaster, but it takes some geeky knowledge to fix it.)
NOTE: If you are using Vista, you may see a "failure to update the MBR" error. In this case, right-click the file and specify "Run as administrator."
You now have bootable Linux thumb drive virus scanner that will handle Windows NTFS drives as well as most other formats!
Source : http://www.davescomputertips.com/articles/security/how_to_create_a_bootable_virus_scanner.php
