Can someone help please, this afternoon I tried many times to download the 500elearn, I can down load it but using both windup and 7zip both reported the data as corrupt, when trying to unpack from zip stage to iso, I’m sure it’s me doing something wrong as I can see thousands of people have downloaded it. I down loaded it all to the same folder on my desktop and tried to unzip from there, thank you

Download all 5 parts into the same folder. Point WinRar (or similar) at part 1. This will unzip all 5 parts into one .ISO file. Use ImgBurn (or similar) to create a CD from the .ISO file. Do not burn the .ISO file straight to the CD.
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WinZip won't do it, 7zip might, jZip and WinRAR definitely will.

Many thanks “I’ve done it” but only because you told me how.

Yep looked to sort this for a while, for anyone else winrar will merge the files into one. 7zip won’t.
It’s a proprietary winrar function.