Check the software help for instructions. Note: If you back up a file that is already infected with a virus, you can re-infect your system by restoring files from the backup copies. Check your backup files with virus scanning software before using them.
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Spread the love. Be part of an IT community with thousands of subscribers. Get the latest news, blogs, and thought leadership articles. Subscribe now. The only absolute criteria for a boot sector is that it must contain 0x55 and 0xAA as its last two bytes. If this signature is not present or is corrupted, the computer may display an error message and refuse to boot. Problems with the sector may be due to physical drive corruption or the presence of a boot sector virus.
Boot sector computer viruses are most commonly spread using physical media. An infected floppy disk or USB drive connected to a computer will transfer when the drive's VBR is read, then modify or replace the existing boot code. The next time a user tries to boot their desktop, the virus will be loaded and run immediately as part of the master boot record.
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