I'm stumped!

[rhyls]

After playing for 3 hours, completely well suddenly the game froze, this as I drew on my bow to fire. I had to shut down the PC  to restart. Later the same thing as I arrived at the forge to commence making a sword. Since then it has done this 4 times all at different points  in the game.
I had a fight with several bandits without any problems. So, I    really don't know where to look.
I cannot see any mods which can cause this.
Any suggestions please.

Thank you

[Sniffles]

Before trubblesnooting Skyrim, reboot your computer and check if any programs have updated recently, new programs or TSRs are running, and generally the comp is operating as it always has, disk isn't full and has been defragged recently etc. Check that all other programs run without problems.

With that having an alls well, revert to a save that the game ran very stable that has all the same mods now installed and see if it acts any different. If it still crashes, your game engine or a mod is corrupted. If no crash, your most recent save(s) are the problem.

[rhyls]

Hi, All you said I have done, didn't make a difference still froze at different times in the game. Eventually I restarted and now all is well.
Thanks for the aid.