Same basic problem with BBC iPlayer Downloads here ... although I'm still running Ye Olde WinXP so apologies for the minor thread hijack but I'm rapidly running out of sensible things to try and nothing has helped so far :( iplayer claims to be compatible
with Win XP onwards so there shouldn't be any problem at all never mind any excuse for producing what is perhaps the most unhelpful error message ever ! Nothing of significance in event logs various and I've even tried updating Win MSI to 4.5 in case that
was the issue.
Previous versions of the most recent incarnation of iplayer install and work correctly without any issues at all but the current version V1.11.0 (which is a mandatory upgrade) fails with the error message shown at the start of this thread no matter what
I try.
PS: I'm not so sure that the previous post is particularly relevant as it links to a very old thread about a completely different problem with a fundamentally different version of iplayer.