Can I use it to play any part of the Halo games:
4gb ram
windows 10 64x
Intel (r) celeron (r) 1.10 GHz
Definitely not, no.
And on the lowest settings?
No, it won't work.
The processor is far too bad for that.
What would the minimum be?
https://store.steampowered.com/.../?l=german
Processor: AMD Phenom II X4 960T; Intel i3550
Graphics: AMD HD 6850; NVIDIA GeForce GTS 450