Windows Defender Threat Detection

Hi h3x1e​ 
The file detected TmpCD20.tmp has nothing to do with Battlefield 2042. It is a temporary file created by another program on your PC.

To resolve this issue, simply empty your temporary folder as follows:  

1- Open Windows Explorer
2- Go to  C:\WINDOWS\Temp or C:\WINDOWS\SystemTemp
3- In the Temp folder, Select All with CTRL+A
4- With all files highlighted, press the Delete key or click the Delete button
5- Once deleted, restart your computer

After that, I recommend running a virus scan with ESET: https://www.eset.com/online-scanner/
You can then safely launch your game.😄