Just provide more specifics. You asked whether a specific device would work with your computer but gave very little details about said computer.
For example, I wanted to give you instructions on how to troubleshoot it a bit. For example, you say everything is fine in control panel but without specifics I'm not sure how accurate that is. I also want to see if you merely have a bad setting somewhere and want to give you instructions on how to check, but I don't know anything about your computer except that it is a dell and about 3 years old.
I could guess at what operating system but that's a lot of work to provide uselessly if I'm wrong.
In any case, you said you already bought it, so you can give it a try when it arrives for far more effort than anyone else trying to determine whether it will work over the internet.
But if you are really serious about finding out in advance, you should provide them more information. But they'd likely need you to do a lot more work testing things than you can do to find out for yourself when it arrives.