If you have multiple monitors, and use UltraMon to make life a little easier, and you happen to use Sony Ericsson Update Service (SEUS), then you may have come in to the same problem as I (and many other users of UltraMon and WindowsBlinds it seems).
The problem is that on startup of the Update Service, I get “Incompatible Macromedia version. Required version available from http://www.macromedia.com. Application will terminate.”
If you get on to SE support, they’ll ask you to go through the steps of un-installing and re-installing the Adobe Flash ActiveX plugin for MSIE, but to no avail. So, it was only after a few wasted hours that it dawned on me, having seen all the references to WindowsBlinds whilst Googling this problem, that it may be my UltraMon. Sure enough, temporarily shut it down, and SEUS works as expected.
Hopefully, this will be of some help to others!