Need to check for 125MB of free space because if you had read the original post for the Example output or within the script it'self it would show that during the process it will use 100MB or more of space. Then the data gets archived and I delete the temporary files created during the process which leaves us with only the archived file.
As an example 2 of my systems export the registry file at around 75-80MB plus the directory listing of about 8MB. But each system this is ran on will be different.

Quote:

Warning! Each run of this backup will temporarily consume up to 100MB of diskspace or more.
Once completed the final size will be between 5 to 10MB of diskspace per run.



The install is not really an "install" in the normal sense, but I needed a method to confirm you have the command line version of 7-Zip and where it's located. So this checks if you have it in C:\7ZA and if not it then downloads it and extracts it there to use.