AutoCAD LT 2013 Cannot load assembly

[asoltwedelJU8MX]

Hello everyone, thank you in advance for any assistance.

We're having issues with our ribbon. My manager and myself have 2013 installed and it's been working fine for quite some time now. We've tried finding a solution but had no luck. IT has looked into it and basically bricked my AutoCAD software.

When we boot the software we get a fault "Command: Cannot Load assembly. Error details: System.Security.SecurityException: Security error. at Audodesk.AutoCAD.ApplicationServices.ExtensionLoader.ProcessAssembly(Assembly assembly) The Zone of the assembly that failed was:

It doesn't prompt what zone it was...

So I assume it's not loading correctly, everything myself and IT did to try and remedy it hasn't worked, it's only made it worse. I was able to use classic mode and use the software. After IT came down and tried some things I can't even right click and get menu options anymore.

IT recently removed our Admin rights, but they say no security changes have been made recently. We no longer have our Ribbon either, and when you type Ribbon in the command box it says the command doesn't exist (may be for newer versions?)

I'm not sure what's going on, I don't think it's anything on our end, because we haven't changed anything, and the software worked fine when we installed it until recently.

Thank you in advance for any information/help you can provide.

If you need more information from me, feel free to ask

Thanks,

-Andrew

[paullimapa]

What Windows OS are you running?

[asoltwedelJU8MX]

Hey Paul, Sorry about that, I should have mentioned that in my original post!

We're using Windows 10 Pro 19045.3930

[pendean]

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@asoltwedelJU8MX wrote:

Hey Paul, Sorry about that, I should have mentioned that in my original post!

We're using Windows 10 Pro 19045.3930

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That's not an approved OS, sorry

You might some free and not free HELP getting that to work over at this other website

https://blog.longbowsoftware.com/category/autocad/autocad-2013/#:~:text=Installing%20old%20versions%... 

[asoltwedelJU8MX]

That, is a very good point. It was working until recently on this OS, but I assume windows did an update that bricked it.

Thank you for the link, I'll look into that and see what I can find out!

[Simon_Weel]

Try a Repair-action from the Windows Programs panel.

[asoltwedelJU8MX]

Thanks Simon, I'll have my IT guy give that a go. I'd try it on my computer but they've revoked our Admin rights. It's a cyber security thing from our parent company, they're supposed to have separate Admin logins for us, but we haven't received them yet.