Rending in to out is crashing PP requiring PC to be restarted

[#1]

Hi over the last couple of days I have noticed that PP has been playing up. 
I worked on a project yesterday for about 4 hours, but when I go to Render In to Out, it makes it part of the way through (sometimes 25%, sometimes 50%) and then it freezes. PP completely locks up and so does my PC.
I can't even Ctrl, Alt, Del to close PP. 

I have no option but to hard restart my PC. 
PP has worked fine for me for over 1yr with no issues. 
I have tried starting a completly new project, new timeline, new clips, etc. but nothing seems to fix the Rendering issue I am having. 
I was having issue exporting also on my last video 2 days ago where It would crash randomly on export. I have updated PP but that has not helped. 

My system specs are:

Ryzen 3600X

16gb DDR4 ram

Nvidia gtx 1660 super.

[#2]

Hi over the last couple of days I have noticed that PP has been playing up. 
I worked on a project yesterday for about 4 hours, but when I go to Render In to Out, it makes it part of the way through (sometimes 25%, sometimes 50%) and then it freezes. PP completely locks up and so does my PC.
I can't even Ctrl, Alt, Del to close PP. 

I have no option but to hard restart my PC. 
PP has worked fine for me for over 1yr with no issues. 
I have tried starting a completly new project, new timeline, new clips, etc. but nothing seems to fix the Rendering issue I am having. 
I was having issue exporting also on my last video 2 days ago where It would crash randomly on export. I have updated PP but that has not helped. 

My system specs are:

Ryzen 3600X

16gb DDR4 ram

Nvidia gtx 1660 super.