Solved
Red screen
Product: Apex Legends Platform:PC Please specify your platform model. PC AMD or Nvidia Model Number NVIDIA GeForce GTX 970 / 10DE 13C2 85081043 / G401 0010 Enter RAM memory size in GB 8 What is...
I had the same issue few days before (but it's gone now, I don't know why), it turns red when I back to the Desktop.
．OMEN by HP 15-dc0091TX
．Intel® Core™ i7-8750H
．NVIDIA GeForce GTX 1070 8 GB DDR 5（Max-Q Design）
．DRAM DDR 4 2666 16 GB x 2（32 GB）
．1 TB WD Black PCIe NVMe M.2 SSD & 1 TB WD Blue SSD
．15.6", WLED IPS, FHD, G-SYNC, 144 Hz
．Thunderbolt 3 Supported
．68,000 mAh Battery Life（2.8 Hours）
The problem can be solved by pressing Alt-Tab few times to switching between the game and the desktop.
