I meant:
- the test Windows OS machine, and
- what will be a test Linux OS machine
BOTH as directly as possible to the Internet modem.
I'm at the end of my rope with this problem. Does that mean I'll not still for answers, no, but I'm done stressing over it. Someone, whether it be Windows or Linux, must have made some software changes that caused this problem. Until someone at Microsoft or the makers of Linux Mint step up to the plate and owns up to their mistakes, I don't see this changing.
I appreciate your efforts to help me fix things. God bless.