The usage of is when looks fine to me. Sentences using is when are definitions of events.
The first one is correct. The second is wrong. The reason is that you cannot use the Simple Future tense in Time Clauses, so those ones that start with when, while, before, after, by the time, as soon as, etc. In your case, the Present tense is adopted; so, the correct sentence is: The software will be installed when the computer is ready.
differences - "When X is" or "When X will be"? - English Language ...
When is the old english letter Æ/æ modernised to A, E and AE?
In school we are taught the vowels: A, E, I, O, U, and sometimes Y. Today's XKCD got me thinking about when the letter Y is considered to be a vowel. I understand (perhaps incorrectly) that in w...
When is "Y" a vowel? - English Language & Usage Stack Exchange
Using "yourself" and "ourselves" in these contexts is incorrect. "Yourself," "ourselves," and "myself" are reflexive pronouns, correctly used when the subject/actor of the sentence and the object/recipient are the same person or group. "I see myself" is correct because I am doing the seeing and am seeing myself. In your latter example, the subject is the implicit "you" and the object is ...
pronouns - When is it correct to use "yourself" and "myself" (versus ...
I always learnt that "more than one" takes a singular verb because it is followed by a singular noun as in: more than one child has bad grades. But what happens when it is followed by a p...