How to find my PS CS5 serial number

[karenc13624692]

I had purchased CS5 a long time ago, stopped using it to switch to a Creative Cloud plan.  CS5 was a download, but I can't find my invoice or serial number anywhere.  Is there an email for Adobe support?  I don't have the time or the patience for their chat representatives.  I've never had a good experience with them.  Or heck, anyone know of a way to find my serial number without an email?

[John T Smith · Accepted solution]

Lost information - see reply #1 in https://forums.adobe.com/thread/2008767

- page has links to programs to find an installed serial number in Mac or Windows

- includes link to your Adobe account to check for registered serial numbers

- when you find your serial number(s) write them down and put in a desk drawer