I've been using Photoshop 7 for like 10 years or however long it's been around. Works for me and I can't justify the expense of current versions, although I did buy Elements 11 (okay) and LR (!!). PS7 was working fine and one day refused to start up, with an error message regarding a TWAIN device communication issue. Based on an internet search, this problem pops up now and then. Removed/reinstalled, no help. Even tried to install PS6, same error message, same result. I've become fairly proficient with GIMP as a result, but I sure miss PS7.
The only unusual thing I did within a day or two prior to the error message - at a public stargaze with my astro club, I was switching between an astro modded 40D and a 60D on the scope taking photos tethered to my laptop. A woman there was fascinated and I noticed she had a 7D on her neck (much more attractive than a goiter, I must say) so I made her evening by putting her 7D on the scope and taking a slew of photos for her, again tethered to the laptop. IIRC, the error message appeared the first time I tried to open PS7 after that.
Laptop runs Vista 32 bit (yeah. I know)
It won't be long until I upgrade computers and PS7 will probably install just fine in the new one, but this just nags at me. Has anyone ever seen such a thing?