Screen stays black with a constant loading cursor?

Don’t know what possibly could’ve happened, was working fine last night. Went to turn it on today to get into some gaming for the long weekend and now I’m stuck on this black screen with a never ending loading cursor. Since then I’ve moved the pc upstairs to they on another monitor and still no dice. Decided to let it load and it’s been about 5 hours and it’s still loading :/ any help?