I had this setup and working OK and was able to update from 11.3.300.268 to 11.3.300.271 with no problems. Everything was silent and I received no prompts.
However for some resons now the update functions does not detect \ download new version 11.4.x.x and the FlashINstall.log shows the below as the last entries :-
2012-8-26+8-20-0.385 [info] 1619 1063
2012-8-26+8-20-0.585 [info] 1614
2012-8-26+8-20-0.585 [info] 1615
2012-8-26+8-20-0.586 [info] 1618
2012-8-26+8-20-0.588 [info] 1604
2012-8-26+8-20-0.588 [info] 1608
2012-8-26+8-20-0.639 [info] 1612
2012-8-26+8-20-0.640 [info] 1620
anyone any idea as to what the problem might be here because as I say it worked previously and there has been no changes that should cause a problem with this.
Moving this discussion to the Installing Flash Player forum.