Win 10 PC problems.

[Carruthers]

This morning, while attempting a PDF download, my computer 'froze'.
I eventually managed to get the task manager going and closed down Firefox but the machine remained unresponsive.

Clicking on the restart option didn't work so I had to resort to a hard shut down.
On restart, clicking on icons in the task bar didn't open programmes eg Mail.
I've had slightly more success when clicking a desktop icon.

I can't see what's going on deeper in the system as calling up task manager now gets only as far as the four options ie swap user etc. and no further.

I'm using my iPad at the minute and the Windows machine, at present showing the Google home page, is extremely slow, to the point of freezing, to open up other sites or programs.

Any thoughts or suggestions as to how to proceed will be welcomed.

Ta!