I have a 64-bit Windows 8.1 The issue is that all the JRE installers version 8 update 45 for either x86 or x64 platform stop silently at the very beginning . Please note that there are no error messages appearing in messagebox form or in system event logs. Clean reboot along with all antivirus shutdown did not help. In fact I have no idea where to go further.

Hehe. Totally agree. These people are someone you'll never meet IRL. Even if they are scrutinizing your life day by day.

ctx - it is assumed that it should point to some context structure, it is(should; may) not variable in usual sense but rather - the function parameter so it may be "pure functional".