Cannot open zips they are either invalid or corrupt


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 rar 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. .. I am thinking it's a
registry problem.. but don't know how to fix or where to start. I just
installed 7zip and still it does the same thing. Yesterday I repaired
the
operating system, thinking that might fix the problem.. :( Would
appreciate
some advice please...

Windows xp home
Sp3

Thanks, Rainy
 
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N

Nate Grossman

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 rar 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. .. I am thinking it's a
registry problem.. but don't know how to fix or where to start. I just
installed 7zip and still it does the same thing. Yesterday I repaired
the
operating system, thinking that might fix the problem.. :( Would
appreciate
some advice please...

Advice: the file is corrupted. Give up.
 
S

Shenan Stanley

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 rar 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. .. I am thinking it's a registry problem.. but don't know how
to fix or where to start. I
just installed 7zip and still it does the same thing. Yesterday I
repaired the
operating system, thinking that might fix the problem.. :( Would
appreciate
some advice please...

Windows xp home
Sp3

You have one part of a multipart zip.
 
R

Rainy

Shenan Stanley said:
You have one part of a multipart zip.
it's a zip not a rar.. only one file inside.. and I downloaded 7zip and
it worked. I have been struggling with this for weeks.. finally after I
asked for help I found the solution.. .lol funny how it works like that
sometimes.. I also downloaded a corrupted zip repair utitlity called
Object Fix and it repaired the corrupted zip.. thanks anyway.. hugs
Rainy
 
R

Rainy

your advice is to never download a zip file again??? That doesn't really
work for me.. If you look at my response to Shenan Stanley you will see
what I did to fix it.. but appreciate your input.. hugs rainy
 
S

Shenan Stanley

Rainy said:
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 rar 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. .. I am thinking it's a registry problem.. but don't know how
to fix or where to start. I
just installed 7zip and still it does the same thing. Yesterday I
repaired the
operating system, thinking that might fix the problem.. :( Would
appreciate
some advice please...

Windows xp home
Sp3

Shenan said:
You have one part of a multipart zip.
it's a zip not a rar.. only one file inside.. and I downloaded
7zip and it worked. I have been struggling with this for weeks..
finally after I asked for help I found the solution.. .lol funny
how it works like that sometimes.. I also downloaded a corrupted
zip repair utitlity called Object Fix and it repaired the corrupted
zip.. thanks anyway.. hugs Rainy

You can have a multipart zip. You should know this - 7-Zip can do it.

7z, ZIP, CAB, RAR, ARJ, LZH, CHM, GZIP, BZIP2, Z, TAR, CPIO, ISO, MSI, WIM,
NSIS, RPM and DEB are all just compression algorithms essentially.
Different ways of doing the same thing - essentially making a file/set of
files smaller by getting rid of 'empty' space. The multi-part compressed
file is more a feature of the application in some ways than the algorithm
you have chosen. It was done legitimately for some so that they could
spread the results across multiple (usually smaller) external media sources
*and* the software 'sharing' community liked it because it allowed for
checksums easily and made the download sizes smaller (in batches) and a
bunch of smaller single files (compressed) is less to download overall.
With high-speed Internet more common, this is not done quite as much.

What is confusing (and the real reason for the response) about your
solution...

First post:
"I just installed 7zip and still it does the same thing."

Post with supposed solution:
" downloaded 7zip and it worked."

Now - I understand (although it is a bit confusing and mentioned almost as a
"and oh yeah...") that you later state, "I also downloaded a corrupted zip
repair utitlity called Object Fix and it repaired the corrupted zip." -->
something I think you might have said first thing. ;-) Skimming the results
might lead someone to quickly believe you had a corrupt 7-Zip install and
somehow had a messed up native compression utility as well. ;-)
 
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N

Nate Grossman

Rainy said:
your advice is to never download a zip file again??? That doesn't really
work for me.. If you look at my response to Shenan Stanley you will see
what I did to fix it..

In the post I replied to you said 7-zip didn't work. Now you're
saying it did.

You must be a blonde.
 
R

Rainy

I have never heard of a zip that comes in parts like a rar does.. I'm up
for learning anytime.. and in this particular zip was one file, a
graphic.. one image! You are right, I was talking about a cam zip
utitlity.. had 7zip on my mind.. lol thanks for all the information..
had trouble with the 7zip and file association.. I had so many unzip
utilities on my computer, I had to uninstall the ones I wasn't going to
use... then went to folder options to make sure zips were associated
with 7zip. It wasn't! . Thanks for wading through my explanation.. I
appreciate the input and all the new information.. and No I didn't know
this.. I have had a computer for 10 years or more and have never seen a
zip that depends on other parts of the zip like a rar does.. Is that
what you mean by Multipart? hugs rainy
Shenan Stanley said:
Rainy said:
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 rar 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. .. I am thinking it's a registry problem.. but don't
know how to fix or where to start. I
just installed 7zip and still it does the same thing. Yesterday I
repaired the
operating system, thinking that might fix the problem.. :( Would
appreciate
some advice please...

Windows xp home
Sp3

Shenan said:
You have one part of a multipart zip.
it's a zip not a rar.. only one file inside.. and I downloaded
7zip and it worked. I have been struggling with this for weeks..
finally after I asked for help I found the solution.. .lol funny
how it works like that sometimes.. I also downloaded a corrupted
zip repair utitlity called Object Fix and it repaired the corrupted
zip.. thanks anyway.. hugs Rainy

You can have a multipart zip. You should know this - 7-Zip can do it.

7z, ZIP, CAB, RAR, ARJ, LZH, CHM, GZIP, BZIP2, Z, TAR, CPIO, ISO, MSI,
WIM, NSIS, RPM and DEB are all just compression algorithms
essentially. Different ways of doing the same thing - essentially
making a file/set of files smaller by getting rid of 'empty' space.
The multi-part compressed file is more a feature of the application in
some ways than the algorithm you have chosen. It was done
legitimately for some so that they could spread the results across
multiple (usually smaller) external media sources *and* the software
'sharing' community liked it because it allowed for checksums easily
and made the download sizes smaller (in batches) and a bunch of
smaller single files (compressed) is less to download overall. With
high-speed Internet more common, this is not done quite as much.

What is confusing (and the real reason for the response) about your
solution...

First post:
"I just installed 7zip and still it does the same thing."

Post with supposed solution:
" downloaded 7zip and it worked."

Now - I understand (although it is a bit confusing and mentioned
almost as a "and oh yeah...") that you later state, "I also downloaded
a corrupted zip repair utitlity called Object Fix and it repaired the
corrupted zip." --> something I think you might have said first thing.
;-) Skimming the results might lead someone to quickly believe you
had a corrupt 7-Zip install and somehow had a messed up native
compression utility as well. ;-)
 
S

Shenan Stanley

<snip>
I have never heard of a zip that comes in parts like a rar does..
I'm up for learning anytime.. and in this particular zip was one
file, a graphic.. one image! You are right, I was talking about a
cam zip utitlity.. had 7zip on my mind.. lol thanks for all the
information.. had trouble with the 7zip and file association.. I
had so many unzip utilities on my computer, I had to uninstall the
ones I wasn't going to use... then went to folder options to make
sure zips were associated with 7zip. It wasn't! . Thanks for wading
through my explanation.. I appreciate the input and all the new
information.. and No I didn't know this.. I have had a computer for
10 years or more and have never seen a zip that depends on other
parts of the zip like a rar does.. Is that what you mean by
Multipart? hugs rainy

Multi-Part Archives are fairly common.

RAR (.RAR or .Part01.rar, Part02.rar, etc or .r01, r02, r03, etc.)
ZIP (.ZIP + .z01, z02, z03, etc or Part1.zip, Part2.zip, etc)

Essentially - it's taken a file/set of files&folders and split it into
several smaller files as it compresses them. You need all the pieces of the
puzzle (all the files in the series) to extract everything successfully.

There's even applications that just split a large file into several smaller
ones (no compression to speak of):

HJSplit (.001 + .002 + .003, etc)
 
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