7zip has "strong" checking in the files. Basically you can't unpack data from corrupted files due to how compression works. So it checks each chunk before unpacking (each chunk has means for strong integrity checks). So the files failing unpack imply that some malfunction on your system or even a virus could be damaging the files.
Have your computer checked for faults or virus.
What do you mean by "Strong" intergrity checking ?
AFAIK it is using CRC32 just like rar and zip.
Also it is possible to unpack data from a corrupted archive however not from the same solid block. bad bytes in block1 one does not corrupt block2 as there is no compression between these blocks.
Also intergrity check does not come before decompression but after
it check if the decompressed data is correct.
Please correct me if I'm wrong.
-- edit --
Doh Necro
Phoenix.Comablack said:
»Im having the same problem with that link. it wont finish the download. did that other download client work?
If you still need the download i can put it on a Gdrive for you