Hi there and welcome
Can you press the windows key + X and click on control panel
Then Clock, Language and Region
Then change date, time or number formats.
Then additional settings.
There set the Decimal back to .
Click ok and it will be saved and used throughout
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.