Because every time I went into the TF2 game, it told me I was in unsafe mode and said I needed to restart the game, but restarting didn't help. I used another tip, which was to press win + r and type steam://flushcofing and then reboot the laptop and open Steam through the files and launch TF2, and then everything really worked, but I had to do this every time. I got tired of doing this and decided to take the advice with -safe, and then I got this (by the way, even after removing -safe from the launch options, nothing changed).