1. This computer is such a slow thing that I can't use it.
2. This computer is such a slow thing that i can't use.
(Which one is correct?)
3.This computer is so slow that I can't use it.
4. This computer is so slow that I can't use.
(Which one is correct? Are both OK?)
#1 and #3 are correct; #2 and #4 are incomplete.
