@TheWeapon78 Do you have any third party devices plugged into the PC? It sounds like there may be a program or device plugged in that could be setting off flags for their anti-cheat system.
Try closing all programs down or attempt a clean boot, then immediately launch Madden NFL 21 as administrator through Origin.
How to Clean Boot your PC:
https://help.ea.com/en-us/help/faq/how-to-clean-boot-your-pc/