Nevertheless, if you are certain the virus only has affected the trunk field and isn't an encrypting virus, the DOS SYS command may be used to restore the very first field.
Otú ọ dị, ọ bụrụ na ị maara na nje ahụ emetụtawo buut ma ọ bụghị nje njehie, iwu DOS SYS nwere ike iji weghachite mpaghara mbụ.