Need Help with fixing possibly corrupted .stl and .obj files with 0x80004005 error code.

[Windows Server]

After changing a permission setting in windows, I had several hundred files that now refuse to open all of them giving an 0x80004005 error code. I have tried using several different programs to open them, 3D Builder, Zbrush, blender, Noesis, Meshmixer and even Photoshop to no avail. I am not really sure how this process is supposed to work so if you need any additional information please feel free to request it. I understand that these files may be forever lost but many are not replaceable and if there is any chance of salvaging them I'm willing to try. Thank you for your time and hope to

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