A compressed version of files, popularly known as zipped files are convenient but also prone to errors. So, when you attempt to open such files using freeware utilities like 7-Zip, you may encounter ...

so I downloaded this zip file of an mp4 movie (3.9GB) as a reward for a kickstarter a while ago but every time i tried to unzip it 'failed crc checks' so tried z-zip ( version 9.2 ) (which the ...