I've heard that fast startup has been causing problems. Should I keep using it? I use an ssd to boot.
Fast startup normally only helps speed up PC with hdd, an ssd is fast enough to be able to load everything with very little delay at startup. You probably won't notice a great difference in turning it off.
If you have fast startup on, the PC is only ever fully turned off during the restart operation. Or if you unplug it. Since Fast startup saves a copy of drivers and windows files into ram at shutdown, it means there is always a constant power stream running through motherboard, and if you unplug PC while its off, there is a small chance it will corrupt files
I always have it off as I always unplug my PC if there are...