If I "go for a run", running does not suddenly exist, except when we are speaking in a loose and metaphorical way. I exist, and I run.
Similarly, if your computer executes a piece of software then perhaps we can point to a pattern in the memory of the computer and say "that is the software and it exists right there physically as electrons". But usually when we talk about software what we are really talking about is the computer doing a certain thing. The computer exists but its doing does not, just like I exist but my running does not.…