unarc.dll error code 11

[SarahWren]

Unsupported Encryption getting unarc.dll error code 11 when unpacking a repacked game/archive. I tried re-downloading, disabling antivirus and running as admin but it fails at the same point. Would I need to do any repair? Question1: Is this always a bad archive so I will need to write a new one, has nothing to do with RAM or is it something else I can try?

 

[riyanroshan]

Unarc.dll error code 11 usually indicates corrupted installation files or insufficient system memory. Reinstall the program, check RAM, disable antivirus temporarily, and ensure enough disk space to fix the issue.

 

[mayank]

The “unarc.dll error code 11” usually occurs during game or software installation due to corrupted setup files, missing DLLs, or insufficient system memory. Fix it by reinstalling the program, updating drivers, repairing DLLs, and checking system RAM.

 

[marcowayne]

This mistake typically indicates that the archive is somehow corrupt or it was not withdrawn correctly. You may want to try some other extractor such as WinRAR or 7-Zip, and ensure that you have downloaded all the components of the file. It is not connected with RAM the majority of time - in case of the failure, re-download the archive at a trusted source.

 

[John]

The unarc.dll error code 11 usually appears during software installation when the system can’t extract files properly. It may result from corrupted archives, outdated drivers, or missing system files. Reinstalling the program, updating drivers, or repairing Windows libraries can fix the issue.

 

[natalia]

"Unsupported encryption" + unarc.dll error code 11 usually means one of two things: either the unpacker that you are using does not support the compression/encryption method used by the archive, or the archive is damaged/corrupt. As perhaps you already tried re-downloading, run as admin and turned off antivirus I will advise you to try another extractor or version. install latest 7-Zip and Latest WinRAR I (unrar) and try again with the following tools. Also WinRAR has a "Test archive" feature which does tell you if parts have CRC errors. If it's an SFX installer, an outdated deleted game, or a re-pack that is utilizing a very particular kind of unpacker, the incorrect tool will show the unsupported encryption message even though the file might in fact be okay.

 

[Emmawoods]

Do not accept errors that hardware RAM to perform failures occur have the same extraction point. Corrupt memory may reverse bits when they are decompressed and interrupt the integrity check. Partially, by several runs of a memory store evaluation program (MemTest86, Windows Selling innovation). Also check the destination drive, if the drive has bad sectors or file system is unstable/flaky, then the record will throw a write error during extraction. Run chkdsk /f and ensure that you have a sufficient amount of continuous free space on the destination (temporarily it always needs to be the size or larger than the archive being extracted).

 

[ethancarter]

A few archive specific things I always make sure to keep an eye on:

• Is this a multi-part archive? Missing even one .r00/.part01 file will fail such as on the same spot. Make sure all parts are included and are labelled correctly.
• If a checksum (MD5/SHA1) is provided with the release you can count on that immediately telling you if you have downloaded the complete release or not.
• Try to extract on another machine/os [Linux with unrar/p7zip] if extracted on another OS it works then your setup you have isolated.
• Also extract into a plain path (C:\temp\extract), simple encode decode of encoded strings into textbox will not accept long unicode paths for some reason.

 

[ethanwalker]

A little but important note, you said a "repacked game/archive". If that repack is an unofficial/pirated release, I can't help you with obtaining/going around DRM for copyrighted games. I can, however, assist with general archive troubleshooting as others suggested above (RAM/disk/checksums/different extractors). If this is a legitimate backup or a file you own, continue with the steps as outlined technically but if this isn't you risk a legal and security issue so consider an official source too.

 

[jameswill8520]

Checklist of what to do in a hurry (in order) - go through these and report back on which of the steps does not work or what the log output will state:

1. Try Different extractor Download latest 7-Zip and official UnRAR/WinRAR and try the "Test" option.
2. One looks for missing parts / wrong filenames (part01, part02, etc.).
3. Additional checksum comparison should perform (MD5/SHA1), if available.
4. Run memory test (MemTest86) At least one complete pass.
5. Run chkdsk and make sure that there is >20% free space on the target disk.
6. Extract on another machine (or a VM) in order to isolate environment problems.
7. If the extractor log indicates "unsupported encryption," then try using a more up-to-date version of unrar (binary) as well sometimes the repackers are using a newer encryption algorithm which can't be handled by older extraction tools. Don't try to "crack" the encryption make use of legitimate tools.
8. If all else fails and the checksum/test fails we have a bad archive so reacquire from a trusted (should be official if possible) source.

Short verdict Not always, it as can be your extractor, RAM, disk some can be missing. But if tests reveal that there is CRC/hash mismatch, then the archive itself is corrupted and you request for a clean copy of the archive.