command line - Extract and overwrite existing files

I am trying to write a batch script to extract files out of an existing ZIP file, into another folder on my desktop and to have the system not prompt me as to whether I want to overwrite the existing files or not. The script works with just -o, but once I add -aoa, I get an error:

"C:\Program Files\7-zip\7z.exe" e file1.zip "-aoaC:\Documents and Settings\All Users\Desktop\all_backup_files"

Answer

The 7-Zip command line options you will need are x, -o and -y:

"C:\Program Files\7-zip\7z.exe" x file1.zip -o "C:\Documents and Settings\All Users\Desktop\all_backup_files" -y

If you type 7z --help you will get a list of valid parameters.

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