I have installed Steam through the software centre and through the Terminal and it does not run.
I am using Ubuntu 13.04 and have recently updated my software and Steam.

This is what i get when i try to run Steam through the Terminal
Code:
Running Steam on ubuntu 13.04 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(1373330809_client)
Installing breakpad exception handler for appid(steam)/version(1373330809_client)
unlinked 0 orphaned pipes
Gtk-Message: Failed to load module "overlay-scrollbar"
Installing breakpad exception handler for appid(steam)/version(1373330809_client)
[0710/122212:WARNING:proxy_service.cc(958)] PAC support disabled because there is no system implementation
/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/steamUI/../common/steam/client_api.cpp (287) : Assertion Failed: ClientAPI_InitGlobalInstance: InternalAPI_Init_Internal failed.

Assert( Assertion Failed: ClientAPI_InitGlobalInstance: InternalAPI_Init_Internal failed.
 ):/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/steamUI/../common/steam/client_api.cpp:287

Installing breakpad exception handler for appid(steam)/version(1373330809_client)
Uploading dump (out-of-process) [proxy '']
/tmp/dumps/assert_20130710122212_5.dmp
/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/steamUI/SteamStartup.cpp (648) : Assertion Failed: ! "There was a problem with your Steam installation.\n" "Please reinstall steam.\n"
unlinked 2 orphaned pipes
CAsyncIOManager: 0 threads terminating.  0 reads, 0 writes, 0 deferrals.
CAsyncIOManager: 59 single object sleeps, 0 multi object sleeps
CAsyncIOManager: 0 single object alertable sleeps, 1 multi object alertable sleeps
[2013-07-10 12:22:11] Startup - updater built Apr 30 2013 10:04:24
[2013-07-10 12:22:11] Verifying installation...
[2013-07-10 12:22:11] BVerifyInstalledFiles: ubuntu12_32/steam is 5543712 bytes, expected 5642843
[2013-07-10 12:22:11] Verification complete
[2013-07-10 12:22:11] BRepairInstalledFiles: ignoring bootstrap file ubuntu12_32/steam
Shutting down. . .
[2013-07-10 12:22:12] Shutdown
Other then that when ever i run Steam normally i get a box Flash and dissapear so quickly i cannot read it, but i believe it says something like "Please reinstall Steam" which i have done many times, any ideas?