computer virus
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carefully inspected before restoration. The Gammima virus, for example, propagates via removable flash drives.[22][23]
Another method is to use different operating systems on different file systems. A virus is not likely to affect both. Data backups can also be put on different file systems. For example, Linux requires specific software to write to NTFS partitions, so if one does not install such software and uses a separate installation of MS Windows to make the backups on an NTFS partition, the backup should remain safe from any Linux viruses (unless they are written to specifically provide this capability). Likewise, MS Windows can not read file systems like ext3, so if one normally uses MS Windows, the backups can be made on an ext3 partition using a Linux installation.
Recovery methods
Once a computer has been compromised by a virus, it is usually unsafe to
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