Thanks. Yes, that's what I say to myself, too, good luck sorting the problem. My experience has been over the years that if you really make use of your Mac to the fullest as I do, running various kinds of scanners, SCSI devices, external drives, video converter boxes (analog to digital), connect video cameras, multiple printers and monitors, use the Adobe suite, iMovie and Final Cut, etc. etc. inevitably things in the OS start to go sour and screw up. The OS just can't handle so many different tasks and devices reliably.
I can usually do an archive-and-install of the OS and clear up a lot of problems; others remain mysterious and unbelievably stubborn. You could spend all of your time trying to fix such problems, if you allowed it, so eventually you just have to give up and live with some. This WMV thing may be one such.
For another example, I just went through days of discussion in the iDVD form trying to figure out why iDVD will no longer burn disks on this computer, and after trying many things to fix it, all failures, we finally gave up and I now create disk images with iDVD instead, and burn them to DVDs with Toast.
Now after this latest archive-and-install, the Flip4Mac WMV player, like iDVD, has decided to find all possible excuses not to work (it is a Microsoft program anyway, isn't it?). Yes, I could get out Pogue's book on OS-X again, visit all the forums and write, write, write about the trouble, try all the suggestions offered, devote hours to the problem, do another A & I, maybe get it going again, and then the next thing would screw up. It's an endless cycle. Eventually you decide that if you are ever going to get any work done with the computer, you are going to just have to live with some of these problems.
The last time I had everything working great, and was congratulating myself on all the successes I'd had in troubleshooting problems and getting everything working fine, I turned on the computer one morning to find a gray screen that never changed. That was the signal for the next round of trouble. Now, at the moment I write this, the most important programs are working OK again, so I will just live with the fact that I can't play WMV files anymore. And got on with my work.