Question

Is the group of words a simple sentence, a compound sentence, a run-on sentence, or a sentence fragment?

Her computer has new software, it runs much faster now.

@Monica75

Answer 1

run on?

Answer 2

Look at this it will tell you exactly!:) This seems to be your problem, hope it helps.
http://www.pitt.edu/~atteberr/comp/0150/grammar/sentencetypes.html

Answer 3

No because if u put a period the end wont make since.