I use an old version of PS to start with when my system crashes PS 6.0, then install CS2 upgrade then CS5 upgrade ... have done that for years, windows 8 wipes out PS and went to reinstall PS 6.0- it will not recognize the serial # which stops me dead. 1st chat person verifies the serial # and says not to include the "dash" ok, still rejects it- subsequent chat persons are too lazy or too young to know it's a valid serial # and claim it's not- have offered to scan it in to prove it is a purchased copy. So far two requests to support have gone unanswered. I have tons of money and time invested in upgrades, adobe has left me swinging in the wind- any help?
Do you really NEED all those old versions running on your system?
You can install the latest version without having installed the prior ones, even though it's an upgrade license. There's a point in the installation process where you can specify just the serial number of the qualifying older version.