Windows 8.1 Update 1 link....

Here is the link of leaked Windows 8.1 update 1

Windows 8.1 Update 1 is divided to several MSU files that must be installed in the following order :

KB2919442
KB2939087
KB2919355
KB2932046
KB2938439
KB2937592

For x32 :-http://files.ngohq.com/microsoft/Windows8.1-Spring-2014-Update-x86.zip

For x64 :-http://files.ngohq.com/microsoft/Windows8.1-Spring-2014-Update-x64.zip