With all due respect, sometimes it isn't the computer, or running an old version, or [insert other user error or 3rd party problem].I have asked him questions many many times.
In fact I speak to him very often.
If bill says it's the computer..it's the computer.
How about you try it on a different computer?
Be sure to always have a spare laptop anyway in case your pc starts acting up.
Sometimes a reported problem just needs investigating and replicating as part of a tech support process.