PC is frozen and blackscreen while editing in Lightroom

Hello,

I have a problem that I have observed for about a month. My PC freezesc and the image is cut of from the monitors, black screen is displayed and a restart is required. This issue is encountered while I am editing pictures in Lightroom, it can happen 5 minutes after I have starte to edit or after 20 minutes.

My Pc configuration is:

Processor: AMD Ryzen 5 3600x 6-core processor 3.80 ghz

RAM memory: 16 Gb Kingston DDR4

GPU: nVidia 970 GTX

Please help me with suggestions.

Best Regards,

Rares Ionut