Special Dell version of Windows?

Hello,

I have a co-worker that just recieved a Dell Precision T5810 workstation for working on.

We use various scripts in Excel using VBA, as well as programs in our CAD system that used the .NET framework. For some reason, only his computer is failing, with very weird issues like methods are not found or what not.

Does Dell have a special version of windows installed on these machines that could be interfering with the .NET framework? Or have some software that is overlaying on certain aspects of windows that could be affecting it?

I ask because his lock screen password box is much different than ours, and when he goes to type a password into the vba editor in Excel, there is a small shield beside it that looks like a Dell Data protection logo.

Any help would be appreciated

THanks