I can open and work on 4k raw video on my laptop which is a win 10 OS, with 16GB ram and a Intel Core i5 CPU, It's an HP that I got last christmas for $499 at sam's club. Using Premier Pro it may take 2 or 3 minutes to index the footage the first time I open it up, but then it's quick at editing and previewing from then on.
Is it the fastest thing on the block ?? No
But it get's the job done and didn't cost me a fortune
If I was editing video all day long, I would probably get a desktop that had more CPU/GPU power and more memory to make the encoding go faster.
Good Luck