[2022] R6S opens and then closes after a while.

Hello @Hachi-Roku thanks for getting back to us.

According to the specs you have given me, it may be that your CPU does not have 4 logical cores. According to our minimum system requirements for the game, you need a CPU with at least 4 logical cores in order to be able to run the game >
https://www.ubisoft.com/en-gb/help/rainbow-six-siege/purchases-and-rewards/article/system-requirements-for-rainbow-six-siege/000080364

I believe your Intel Celeron chip may only have 2 logical cores, would you please double-check this by opening your Task Manager > select the Performance tab > highlight your CPU and check the amount of cores and logical cores it has listed