My computer that's running Windows 7 detects all flash drive file systems as RAW, and thus shows an error message to format them as soon as they're plugged in.
I tested all the flash drives in other computers and have no problem and their file system is FAT32.
How can I fix this issue?
sfc /scannow
from an admin command prompt. If this is a hardware issue though you'll need to get a new motherboard or perhaps an add-on PCI-E card that supplies USB ports.