AntiCMOS.a is one unpleasant virus to deal with. It comes under a special category known as boot sector viruses. So what is a boot sector? In your computer, all of your disks and hard drives are divided into small sectors, the first of which is called the boot sector. The boot sector contains the MBR (master boot record). The Master Boot Record contains important data on the location of various partitions of the operating system such as Windows Vista.

So what does a boot sector virus like AntiCMOS.a do? Generally, it affects the MBR and the hard drives located in the boot sector. It is essential you follow genuine boot sector virus removal procedures and remove AntiCMOS.a immediately before it causes severe damages on your computer system. Be warned as the damage AntiCMOS.a and associated viruses causes is incomparable to what a normal rogue spyware would do to your computer.

Boot Sector Virus Removal instructions for AntiCMOS.a

1. Run a full scan using a genuine antivirus program. Once AntiCMOS.a has been detected, quarantine and remove it. In some cases however, the antivirus engine may not be able to remove AntiCMOS.a so it is best you try two or three antivirus programs before you move onto the next step. For example, many users reported that AVG Antivirus was able to detect AntiCMOS.a but they had no luck removing it.

2. The second method is only recommended for experienced computer users. If you are not experienced then you are recommended to call a technician to do it for you instead.  First, turn off your computer then insert a boot disk into floppy disk drive. Choose a floppy disk which has been created with your antivirus program. Now switch on your computer until you see the “A:/>” prompt appear. Now scan all your hard drive and remove AntiCMOS.a once it has been detected.

3. The last method, probably the least favored, is to reinstall your operating system. This unfortunately means that you will have to erase all of the content in your hard drive. If you have bought your computer from a genunine computer vendor then an OS reinstall CD should have come with your computer package. If you do not have one then you are recommended to purchase a real Windows Operating system CD as soon as possible. Again, you are recommended to get someone experienced to help you with this method if you do not know much about computers.