Increasing frequently Windows Hangs

Over the last couple of weeks I have had to use the PC's reset button a number of times because Windows 10 just froze. Using the reset button is something I have not had do for a very long time.

System has been stable for a considerable period and no new programs have been added for months. There are no error messages, no BSOD and windows file check comes back OK. Mostly happens during an attempted drag & drop procedure or when using firefox although both of these can be performed 99% of the time without any issues except for a lag between dropping a file in a program and it appearing in that program, say 10-15 seconds instead of instantly.

The other issue of note is that ctrl-alt-del no longer brings up the menu it once did (task manager, power off rtc) once Windows hangs.

To explain "hangs" or "freezes" in more detail:
The currently used program stops responding and I can swap into another program and close it. I can do this once or twice then everything freezes and I need to use the reset button.

I have a feeling this is a Windows issue but I am not ruling out a hardware problem, any thoughts welcome.

Thanks for your reply Ken, the reliability monitor threw up 2 things, 1/ that a windows update had occurred on the same day and 2/ a driver I had installed 2 weeks ago, Apple's Bonjour Print Services has been having continued problems.

I will remove this and see how it goes.

Again, thanks.