issue with dwg files

Hello experts,

I have a dwg file that is corrupted or encrypted and I need to fix it.

Is there any tool I can use to check the integrity of the dwg files.
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SR ZakNetwork Solutions Asked:
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btanExec ConsultantCommented:
maybe a quick check suggested by the principal themselves with various steps
http://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/AutoCAD-File-Corruption.html
otherwise, try evaluation copy of s/w just to make the file legitimacy for recovery chances of prev copies
http://www.recovermyfiles.com/autocad-dwg-data-recovery.php
Hopefully from Autocad autosave by default, it should have saved dwg file automatically with ac$ as default extension, and if we can just find the *.ac$ file and change ac$ to dwg. There may be slight chance. The AutoCAD's autosave file is saved in this folder: C:\Users\[User Name]\appdata\local\temp\. typically

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