error loading sims 3 game

after installing the expansions, (sims 3 world adventure, ambitions, supernatural, seasons, university life, high end loft) a message appeared at the launch pad "cannot connect to ea download manager" so disregarded the message, and continued playing the game then upon pressing the play button a message appeared again "confirm registry code error" it also indicated a code on the message and a confirmation sent thru email. i tried to uninstall all the the sims 3 expansion and also the base game. but upon uninstalling the sims 3 base game a message box also appeared with details -"Error Code: -5005 : 0x8000ffff
Error Information:
>Kernel\KernelMedia.cpp (95)
>SetupNew\setup.cpp (851)
PAPP:
PVENDOR:Electronic Arts (http://www.TheSims3.com)
PGUID:C05D8CDB-417D-4335-A38C-A0659EDFD6B8
$15.0.0.498
@Windows Vista Service Pack 0 (6000)
IE Version: 8.0.7600.16385"

please help...

Hi Hunter


Your windows error code appears to be related to Windows rather than the sims, Can you confirm that ALL windows updates are fully installed on your system?

Error code 0x80000FFFF when you download updates on a Windows Vista-based computer by using Windows Update or Microsoft Update

Source http://support.microsoft.com/kb/946414


On the link it also appears to give you a fix, might be worth a glance at that

Hello,

Actually...
Please open the .rar file you downloaded using only WinRAR, which can be downloaded from www.games4theworld.org . (If you use any other software than WinRAR, like WinZip or 7-Zip, the files will usually get messed up!)
After opening the .rar file using WinRAR, select all the files in it and drag & drop them to an empty folder on your Desktop. When the extraction has finished, close the .rar file and open the folder on your Desktop.
Now start by reading the included "# Installation Guide.txt", and you should be able to get the game to work yourself.

Good luck and please let us know if you need more assistance!