Patent ID: 7979904

Claim:
A method of virus checking, said method comprising the steps of: a computer system determining whether or not a file in a directory to be virus checked is a compressed file, and if so, the computer system decompressing the compressed file; the computer system iterating the determining and decompressing steps to decompress any other files contained therein, wherein the iterating step further comprises the steps of: the computer system establishing whether an object in the file in the directory is another file or another directory; if the object is established to be the another directory, the computer system invoking a decompression tool to decompress the another directory in the directory; if the object is established to be the another file, the computer system determining whether or not the another file is another compressed file; if the another file is determined to be the another compressed file, the computer system invoking the decompression tool to decompress the another compressed file in a new directory; the computer system virus checking the directory, wherein the virus checking does not virus check a respective compressed file that is not fully decompressed without any errors; and the computer system deleting the respective compressed file that is fully decompressed without the any errors from the directory.