Had the same problem here - "Error - Can not find the Macromedia Flash". I was
using LCARS System47 screensaver from mewho.com. It's an excellent and stable
screensaver, and the best free one I've found with dual-monitor support. Adobe
auto-updated Flash after I'd installed the screensaver, and that's when I
started getting the error. So I thought maybe System47 was using Flash. I went
back to mewho.com, got the latest install, installed over the existing, and my
problem is solved. My kudos to Adobe and mewho.com for staying on top of
things. (Adobe may not have replied to questions in this forum, but how could
they know? It would be impossible for them to test every one of the possibly
millions of real-world scenarios. But their products are always top-notch and
well-supported.) Hope this helps.