I'm sorry to hear this has happened. I'll admit I had some trouble understanding what your issue is, so I'm going to ask you to clarify on a couple points:
Your model is the PN51E550?
Your behavior is that after installing Allshare on your PC, you're unable to share files from this window, right? http://www.samsung.com/global/allshare/pcsw/images/q_guide_14.jpg
i have Samsung 51e550 plasma.
used to work with allshare until something happened to my d partition and i had to install and make settings from the beginning.
my os is win 7 64 bit.
after installing allshare , set the folders i want to share, allowed all permissions in allshare and defined sharing on those folders , i can't see those folders in allshare window, even that it shows kind of transferring proses.
when i try to add one of the folders again it says : "the folder is already exist"
the tv do show the allshare device from which i used to see the shared folders/files ( so i suppose it is not an net connection issue) , but when i choose let say videos, or the other one's, it says that there are no files/folders.
i read a lot on the net and tried almost everything, but it didn't help.
also, a lot of times that i try to click one of the allshare options, the program crashes.
please, please- HELP.