isdone.dll and unarc.dll errors

Hi Sal,

If you are trying to install drivers/services inside Sandboxie, they will fail, as that is not supported.  

If you are experiencing a different issue, please provide more information as per the guidelines:
How to report problems with Sandboxie

Regards,

good morning,

I believe that the setup file (it would seem to have been created with inno setup) only executes a decompression program (freearc) and copies the obtained files to an installation folder.

I could send you (regardless of the size of the archives and if you want) the individual setup files (the size of a few MB in which you could certainly extract the installation instructions).

In the meantime I have asked the package releasers for explanations why this kind of error occurs.

Thank you, see you soon

the two PCs on which I tried to install the repacks are:
Acer Predator Portable PC 16GB RAM GTX970M
PC Assembled 3GB RAM GTS250
Sandboxie 5.30, Windows 10 x64 bit 1809 on both (Pro version on the assembled and Home on the laptop)
Windows Defender + Windows Firewall updated to the latest version
the error message is:
ISDone.dll: an error occured when unpacking! unarc.dll returned to error code -1 ERROR: archive data corrupted (decompression fails).
if you want, I can attach screenshots.
I confirm that without using sandboxie, the error does not appear
see you later

Hi Sal,

Please follow the guidelines I provided earlier so that I can review the situation.

As a suggestion, you may want to try to decompress the files outside Sandboxie, and then copy them to your Sandboxed folder (Typically located under C:;\Sandbox...) 

I'll leave this thread open so that other users can review and assist. 

Thanks!

Hi, it is a common error you can come across when you install anything software or game on PC using Windows 10 or 8. The 'isdone.dll' error might be caused when the registry in your computer has been destroyed or damaged and the 'unarc.dll' file error can occur when a program is not able to locate and use this file. Both the error can be fixed easily and differently. Both isdone.dll and unarc.dll errors actually can be fixed to fix isdone.dll you need not run registry cleaner if still, it doesn't work try a step by step solution to fix isdone.dll.

In order to fix unarc.dll, you need to download and re-install the ‘unarc.dll’ file in a specific folder of PC type 32 bits or 64 bits { Windows>> System32 } or { Windows>> WOWsys64}. Now restart the PC. If it still doesn't work then follow step by step solution to fix unarc.dll.

I solved this poblem by changing from within the Sandbox the "system variables" setting for TMP, TEMP folders to an empty folder outside of my system profile (this is for preventing any sandboxed processes from modyfying files in my real temporary folder), then enabling Full access to that specific folder in the Sandbox settings. In that case unpacking completes without any errors. After a successful installation the changed settings can be safely reverted.

These errors are obviously caused by the more strict access rights and permissions policy introduced in Win 10. I never faced issues like that with  Win 7 or 8. Hopefully, I do not put my system at risk by making  an empty non-system folder accessible and perhaps there might be a more subtle and secure solution too.