Invalid or Corrupt Zip Files


R

Rainy

Hi, every time I try to unzip a zip file using either winzip, winrar, or
jzip, I get the prompt that the file is either invalid or corrupt. so I
downloaded a new unzipping utility called Cam Unzip which is now telling
me I only have one part of the zip. like a war that comes in parts.. ?
(It's only one zip) I would appreciate knowing how to fix this one.. I
have been searching for an answer for a few weeks.. so far all I have
found is a suggestion to go to Tools Folder Options, File types, click
on the unzipping utitlity, advanced and make sure that confirm open
after dowload has a check mark..it already had a checkmark, so now I
don't know what to do. Appreciate some advice.. I am thinking it's a
registry problem.. but don't know how to fix or where to start.
Yesterday I repaired the operating system, thinking that might fix the
problem.. :(

Windows xp home
Sp3

thanks Rainy..
 
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M

M.I.5¾

Rainy said:
Hi, every time I try to unzip a zip file using either winzip, winrar, or
jzip, I get the prompt that the file is either invalid or corrupt. so I
downloaded a new unzipping utility called Cam Unzip which is now telling
me I only have one part of the zip. like a war that comes in parts.. ?
(It's only one zip) I would appreciate knowing how to fix this one.. I
have been searching for an answer for a few weeks.. so far all I have
found is a suggestion to go to Tools Folder Options, File types, click on
the unzipping utitlity, advanced and make sure that confirm open after
dowload has a check mark..it already had a checkmark, so now I don't know
what to do. Appreciate some advice.. I am thinking it's a registry
problem.. but don't know how to fix or where to start. Yesterday I
repaired the operating system, thinking that might fix the problem.. :(

ZIP files used to be able to be produced in multi parts. This used to be
the norm when we were still using 1.44 Mb floppy discs. Unfortunately, the
information required for unzipping the file set was always stored at the end
of the last file in the set. It sounds as though you have either the first
file or one of the intermediate files. Without the last file and at least
all the files that preceded the one that you have, you cannot unzip it.

I could be wrong here, but I do not believe many (if any) modern ZIP
utlities even support spanning between multiple ZIP files which is why they
believe the file to be corrupt (as in: this utility doesn't recognise the
file).

If you can locate all the files in the set then you probably need to find an
old version of PKUNZIP such as the one here:

http://www.aoml.noaa.gov/ocd/necop/pkunzip.html

This needs to be run the old fashioned way (from a DOS command line) though
some windows front panels were produced, Google fails to throw up any of the
ones that I knew of.
 
R

Rainy

thanks I got it sorted out... it was not just one file but every zip I
tried to unzip... I finally downloaded 7zip and a utility called
Object Fix and it seems to be the workaround I needed..thanks for
jumping in here.. it's appreciated! hugs Rainy
 
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