Windows 10 Start Menu not opening, Explorer refreshes whenever folders are opened and said folders close immediately. URGENT help needed.

[RUDY03]

Genuine Windows 10, came with Asus Zenbook.
Since yesterday, I can't save anything, as the "save" browser box doesn't open.

As soon as I open any folders, explorer refreshes and said folder is closed instantly.

Also, the Start Menu doesn't open.
Tried running MalwareBytes once, got a BSOD, will try again. Please help ASAP, its my dad's laptop and he needs it for work.

 

[Neemobeer]

I would start by running SFC /SCANNOW

 

[galevera]

I would start by running SFC /SCANNOW

That worked, thanks so much!