Has anyone face such a problem as mine?

I update my laptop (xps2014) to win10 early this month. After update my laptop was left with 100gb++, it was all ok until last Friday suddenly my pc was reporting low disk space, check my system and found out that Windows take up 100gb++, leaving me with 1gb space left.

FYI my laptop was a 256gb SSD version, I check my actual storage consumption and found out that the previous and current windows actual file size was only 40gb, but dunno why it take up so much suddenly, it was all fine for the pass few weeks with win10.

Could anyone help me. I cant seem to find an exact answer on solving my problem on Google. Thank you.

I suspect the old version was the culprit but i recall on the first 2 weeks i install Win10 the system and restore was only 40+ gb why suddenly it rises so much.

Finger cross, try removing the old version and see, if this does not work then is no coming back to win8

Update on my case, after removing the old windows... it still did not resolve my problem.
My system and reserve still use up 139gb....

I think it is abnormal to use so much.

Windistar and found actually the system reserve 100+ gb was a *.etl file in Mcafee. I guess is sometype of backup or encryption.

Found nothing in Mcafee so i just delete the whole thing. Now everything back to normal.