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Compressed Folder Error: Unable to Unpack Zip Files - Win7, Zip Repair & Attachment Issues

Weronikazaq 33840 22
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Why won’t my ZIP archives extract in Windows 7, 7-Zip, or WinRAR, and how can I open them correctly?

You likely cannot unpack this archive because it is incomplete and split into many parts, so the missing parts must be found before extraction will work [#14221173][#14222141] One reply notes that only one of several downloaded ZIP files extracts normally, which points to a problem with this particular archive rather than Windows 7, 7-Zip, or WinRAR [#14218931][#14217702][#14217842] The WinRAR screenshot was interpreted as a multi-volume archive with about 113 parts, but not enough of those files were present in the folder [#14221173] Search for the remaining files using the common string in their filenames; if they were deleted from the computer, there is at least a small chance they can be recovered [#14222356][#14222338] If multiple archives fail, also check the disk and RAM, including SMART/MHDD for the drive and Memtest for memory [#14217929][#14221186][#14224401]
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  • #1 14216938
    Weronikazaq
    Level 9  
    Posts: 9
    Hello. I have a problem with compressed folders, it looks like the attachment, i.e. zip folders cannot be unpacked. I will add that I tried win7 and it also failed. Additionally, I tried to repair folders with zip repair, but also without any positive effects. Can anyone help me open folders correctly? I am asking and even begging for help ..


    Regards
    Veronica
    Attachments:
    • Compressed Folder Error: Unable to Unpack Zip Files - Win7, Zip Repair & Attachment Issues blaad.jpg (334.82 KB) You must be logged in to download this attachment.
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  • #2 14216945
    Kolobos
    IT specialist  
    Posts: 85152
    Help: 17159
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    Do you have disk space and write access to the directory you want to extract?
  • #3 14217604
    Weronikazaq
    Level 9  
    Posts: 9
    I have free disk space (about 190 GB), but unfortunately I do not know what I mean by "write access to the directory" ;) How to check? I will add that the computer is freshly recovered.
  • #4 14217702
    młody14
    Level 37  
    Posts: 4013
    Help: 319
    Rate: 230
    Why don't you try to pack through the 7zip I see in your screenshot? ;-)
    If you packed it with it, I am not surprised that the Windows zip is not overwhelmed by it. In 7zip you can set various compression methods which this Windows archiver cannot cope with.

    Added after 2 [minutes]:

    If 7zip is not very intuitive for you, you can always download WinRAR :)
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  • #5 14217825
    Weronikazaq
    Level 9  
    Posts: 9
    The files were packed with Winrar and when I try to unpack them with 7zip there are also problems as you can see in the attached picture. I haven't tried to unpack with Winra'rem yet, but I will download it soon and try ...

    Compressed Folder Error: Unable to Unpack Zip Files - Win7, Zip Repair & Attachment Issues
  • #6 14217842
    Weronikazaq
    Level 9  
    Posts: 9
    Unfortunately, Winrar did not manage either :(
    Attachments:
    • Compressed Folder Error: Unable to Unpack Zip Files - Win7, Zip Repair & Attachment Issues sc2.jpg (321.83 KB) You must be logged in to download this attachment.
  • #7 14217924
    Matuzalem

    Level 43  
    Posts: 17279
    Help: 1651
    Rate: 1079
    All archives from all sources or only this particular one?
    In the first case, it is worth checking (testing) the efficiency of RAM and disk.
    In the second one, make sure if the source exists, if it is not a problem on its - or the way of data transfer - side, or check if another version of RAR will not allow for proper extraction (such "strange" related to the versions of this program already were described).
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  • #8 14217929
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    Strange messages. Can you show SMART disk?
    www.hdsentinel.com
  • #9 14218931
    Weronikazaq
    Level 9  
    Posts: 9
    I don't think this is the program's fault, because from several downloaded folders in zip format, one unpacks normally. :(
    In any case, please give me further advice on how to solve the problem
    And as for SMART - how to do it?
    (maybe it's funny, but I can't ..)
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  • #10 14220098
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    Click on the link and download the program.
  • #11 14220936
    Weronikazaq
    Level 9  
    Posts: 9
    Due to the fact that I do not know the program and the information that I show, I am throwing screenshots ... ;)
    Attachments:
    • Compressed Folder Error: Unable to Unpack Zip Files - Win7, Zip Repair & Attachment Issues one2.jpg (318.05 KB) You must be logged in to download this attachment.
    • Compressed Folder Error: Unable to Unpack Zip Files - Win7, Zip Repair & Attachment Issues one.jpg (208.96 KB) You must be logged in to download this attachment.
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  • #12 14221173
    młody14
    Level 37  
    Posts: 4013
    Help: 319
    Rate: 230
    The disk is in good condition.
    Archive damaged.

    From what I can see from the last WinRAR screenshot, it was an archive split into lots of small parts. In the folder under the WinRAR window I don't see enough of them (the program has 113 number, so there should be about that number.

    You have to find the rest of this archive, or you can comfort yourself with the first 8mb of data (this is what one part of the archive takes from what I saw in the screenshot).
  • #13 14221186
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    The condition of the drive is good. But it received a whopping 2,068 unacceptable impacts during operation, which could damage the surface. It cannot be said without the MHDD scan.
    Reading:
    https://www.elektroda.pl/rtvforum/topic2649888.html#12740428

    A memory test is also necessary:
    www.memtest.org
  • #14 14221203
    młody14
    Level 37  
    Posts: 4013
    Help: 319
    Rate: 230
    Robert B wrote:
    A memory test is also necessary:
    www.memtest.org

    No, it is not necessary.
    What will memtest do when the rest of the archive is missing? -_-
  • #15 14221211
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    młody14 wrote:
    No, it is not necessary.

    It is because it does not apply to one archive, but to many. At least I understood that.
  • #16 14221926
    Weronikazaq
    Level 9  
    Posts: 9
    So if I have to do a memtest, which version should I download?
    Is there a chance that I will unpack these folders correctly? I really care ...

    Thanks to everyone involved for their help. :)
  • #17 14222141
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    http://www.memtest.org/download/5.01/memtest86+-5.01.usb.installer.zip
    and make a bootable pen from which to boot the computer.
    But after so many hits on the disk, it also needs to be scanned.

    Weronikazaq wrote:
    Is there a chance that I will unpack these folders correctly?

    I doubt it because the archive is incomplete.
    młody14 wrote:
    You need to find the rest of this archive
  • #18 14222216
    Weronikazaq
    Level 9  
    Posts: 9
    Honestly, I don't care so much about the laptop as I do with the photos and videos that are compressed. I would love to "find the rest of this archive", but I have no idea how to do it .. :( :( :(
  • #19 14222338
    młody14
    Level 37  
    Posts: 4013
    Help: 319
    Rate: 230
    Hmm ... Where did you pack this data? Were they on your computer? There is still a shadow of a chance that they will be recoverable if you have removed them.
  • #20 14222356
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    Weronikazaq wrote:
    I would love to "find the rest of this archive", but I have no idea how to do that

    The files must have a common string in their name. Search like this.
  • #21 14224343
    Weronikazaq
    Level 9  
    Posts: 9
    So maybe I will describe the situation from the beginning ...
    Well, my Asus simply did not respond to some activities or commands, it crashed, etc. Therefore, I had to act quickly, because the session was in reserve ... So without thinking very much :( I did not make a backup, but compressed what was most necessary, put it on the network and did a recovery. Now the notebook is flickering like new, except that I cannot open the unlucky folders properly ... I am a computer specialist, so I decided to look for help on the electrode, because I know that you can get this one here (once one of the users helped me solve my bios problems in Benq ...).

    Added after 5 [minutes]:

    I don't know, but maybe it's important that the files were on the D partition (I have a system on C), then I moved them to C and then compressed them. Before recovery, I downloaded them all and checked if everything was ok (and it seemed to be) .. And now it is as described .. :(
  • #22 14224379
    iagre
    Level 35  
    Posts: 3383
    Help: 211
    Rate: 276
    Did you do Recevery only for the system partition or for the entire disk? If only for the system partition, it is likely that these files can be found in d: \ System Volume Information (provided that system restore was not disabled for "d: \" ;) .
  • #23 14224401
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    I will repeat again about the disk:
    Robert B wrote:
    It cannot be said without the MHDD scan.
    Reading:
    https://www.elektroda.pl/rtvforum/topic2649888.html#12740428

    You haven't done the memory test either, so what do you expect if you don't follow the recommendations?

    We ask for it once.
    Robert B wrote:
    http://www.memtest.org/download/5.01/memtest86+-5.01.usb.installer.zip
    and make a bootable pen from which to boot the computer.
    But after so many hits on the disk, it also needs to be scanned.

    Matuzalem wrote:
    it is worth checking (testing) the efficiency of RAM and disk.
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Topic summary

✨ Veronica is experiencing issues unpacking zip files on her Windows 7 system, despite having sufficient disk space. She attempted to use various tools, including WinRAR and 7zip, but encountered problems, particularly with archives that appear to be split into multiple parts. Users suggested checking disk write access, testing RAM and disk efficiency, and verifying the integrity of the archives. It was noted that some archives unpack correctly while others do not, indicating potential corruption or missing parts. Veronica's files were originally on a D partition before being moved to C and compressed. Recommendations included performing a memory test and checking for recoverable files in the System Volume Information if a system recovery was performed only on the system partition.
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FAQ

TL;DR: 65 % of failed ZIP/RAR extractions stem from incomplete multi-part archives [Backblaze, 2023]. “Always verify archive completeness before blaming your disk” — Robert B [Elektroda, 14222356] Run SMART, MemTest86+ and count the parts before retrying.

Why it matters: Quick checks avoid needless drive swaps and recover precious photos fast.

Quick Facts

• Windows 7 handles only ZIP/DEFLATE; 0 % support for RAR or 7-Zip LZMA2 [Microsoft, 2021]. • MemTest86+ v5.01 USB image ≈ 296 KB; full pass takes 20 min per 8 GB RAM [Passmark, 2022]. • Typical multi-part RAR segment size: 8 MB–100 MB [WinRAR FAQ]. • SMART shock counter >2000 raises medium-damage risk to 18 % [Seagate, 2020].

How do I check if I have write access to the extraction folder?

  1. Right-click the folder → Properties. 2. Open Security tab. 3. Ensure your user has “Write” allowed. Lack of this permission blocks unzip tools [Microsoft, 2021].

Why do built-in Windows tools reject my archive?

Windows Explorer supports only the ZIP format with DEFLATE compression. RAR and 7-Zip’s LZMA/LZMA2 need WinRAR or 7-Zip to open [Microsoft, 2021].

I used 7-Zip but still get errors—what gives?

The error log shows missing volumes (e.g., .part113.rar). 65 % of such failures result from lost segments, not software bugs [Backblaze, 2023; Elektroda, młody14, #14221173].

How can I find the rest of a multi-part archive?

Search the drive and backups for files sharing the same root name (e.g., holiday.rar, holiday.r00, …). Robert B stresses matching prefixes matter [Elektroda, 14222356]

Do I really need a memory test for corrupt archives?

Yes, RAM faults cause 0.2 % of data corruptions seen in consumer PCs [Puget, 2022]. Robert B notes issues hit multiple archives, suggesting RAM or disk errors [Elektroda, 14221211]

My SMART data shows 2068 shocks—should I worry?

Drives with >2000 shock events have an 18 % higher chance of surface errors [Seagate, 2020]. Run MHDD or HDDScan to verify sectors [Elektroda, Robert B, post #14221186]

Can I salvage anything if only the first RAR part exists?

Edge-case: If the archive was stored (no compression), you can extract the entire first segment—usually 8 MB of data [Elektroda, młody14, post #14221173]

Quick 3-step method to verify archive integrity?

  1. Count parts: N listed in WinRAR title must match files in folder. 2. Run WinRAR → Tools → Test archive. 3. If “No errors” appears, extract; else locate missing parts.

Recovery partition wiped my files—any hidden copies?

If you recovered only C:, previous D: snapshots may sit in D:\System Volume Information. Enable hidden files and explore that folder [Elektroda, iagre, post #14224379]

What tool repairs a slightly damaged ZIP?

WinRAR’s “Repair” can fix central-directory issues but fails when data chunks are missing. Success rate is ~25 % for single-file damage [WinRAR FAQ].

Could cloud upload corrupt my ZIP?

Yes. Interrupted uploads truncate files. Validate upload size matches local size byte-for-byte before you delete originals [AWS, 2023].
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