Have you tried đồ sộ tải về a zipped or a RAR tệp tin just đồ sộ encounter the error message The archive is either in unknown format or damaged when trying đồ sộ open it?
Rest assured that you aren’t the only one complaining about this unpleasant WinRAR situation. To better grasp, note that these issues usually result from RAR tệp tin corruption after tải về, CRC errors, virus attacks, and not only.
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This guide will show you the easy ways đồ sộ fix this issue and restore normal service on your PC.
How đồ sộ fix The archive is either in an unknown format or damaged?
1. Try đồ sộ re-download the zipped or RAR archive file
The archive is either in unknown format or damaged annoying issue may also be the result of an incomplete tải về.
Therefore, as easy as it may seem, don’t hesitate đồ sộ redownload the zipped or RAR archive files, most likely đồ sộ a different location, and see if this solves the problem.
If they aren’t, the tệp tin could be damaged, and none of your actions can improve things. If you’ve tried downloading the tệp tin from a specific trang web, don’t hesitate đồ sộ inform the site owner about the issue and if it is from a friend, ask him đồ sộ resend it.
2. Fix bad sectors
- Press the Windows key + S, type cmd, and click Run as administrator under Command Prompt.
- Type the command below and hit Enter:
chkdsk c: /r
- Now, if you get a prompt, press Y and wait for the command đồ sộ finish running.
In some cases, the tệp tin might not be the cause of the archive is either in an unknown format or damaged. Instead, it might be due đồ sộ bad sectors on your hard drive.
The solution đồ sộ this is đồ sộ repair these bad sectors.
3. Try WinZip
Consider that the issue could result from a temporary or even permanent glitch of WinRAR itself, and the quickest and simplest fix would be đồ sộ replace it.
You’ve seen that the message The archive is either in unknown format or damaged pops up unexpectedly and leads đồ sộ a supposed corruption of the RAR tệp tin.
Since you experience this issue within WinRar, consider opening the archive with WinZip this time. Navigation is straightforward, with the guarantee đồ sộ easily unzip all major tệp tin formats.
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Moreover, the interface easily adjusts đồ sộ suit touchscreen devices, while you can connect đồ sộ Dropbox and Google Drive and work smoothly on the go or at the office.

WinZip
Users often report getting errors about the unknown format or damaged archives. Install WinZip đồ sộ correct them easily!4. Run a malware scan
- Press the Windows key, type virus, and select Virus & threat protection.
- Click Scan options.
- Now, choose Custom scan and click the Scan now button.
- Finally, select the faulty tệp tin, click Select Folder, and wait for the scan đồ sộ complete.
It’s not uncommon đồ sộ discover that severe malware attacks lead đồ sộ corrupt RAR files. If the downloaded tệp tin is corrupt, you can face the archive is either in an unknown format or a damaged error.
If Windows Defender cannot fix the issue, we recommend using an award-winning antivirus such as Eset Antivirus.
Long story short, it offers rock-solid protection against all virus threats and extra features đồ sộ keep you safe from the latest online scams.
Moreover, with over trăng tròn years of experience in antivirus/anti-malware solutions, you don’t have đồ sộ worry about the usual false positives you get from other antivirus options.
5. Use the built-in tool
- Right-click the faulty tệp tin.
- Select the Extract Here option.
- Now, wait for the extraction process đồ sộ complete.
If WinRar keeps returning the archive is either in an unknown format or a damaged message, you should use the built-in tệp tin decompressor. This tool is effective and can unzip just about any tệp tin.
6. Use the WinRar repair feature
- Launch the WinRar phầm mềm and click on the faulty tệp tin.
- Click the Repair icon at the top. If you are sure the tệp tin is corrupt, double-click it and select Repair archive.
- Now, choose a location đồ sộ save the tệp tin and click OK.
- Finally, wait for the repair process đồ sộ complete and click the Close button.
If this built-in tool does not work, you can use one of the best tools for repairing corrupt archive files.
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That is about it for the archive is either in an unknown format or damaged error. We believe you have all the information needed đồ sộ fix the issue in this detailed guide.
If you want đồ sộ know how đồ sộ fix the WinRar no archive tệp tin found error, kiểm tra our detailed guide đồ sộ tự it quickly.
Don’t hesitate đồ sộ share how you’ve solved this issue in the comments below.
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