Lot of people know wkAntiKeyboardHook WormKit module made by CyberShadow.
This module should enable the Alt-Tab (and similar) keyboard combinations, on the systems where they are disabled.
Should? Yes, because sometimes it doesn't work.
In most cases this plugin work just fine. Sometimes (usually on fast computers) part of wkAntiKeyboardHook.dll code (which should to block further SetWindowsHookEx function calls), executes to late (when W:A has already installed hook).
It is called a "race condition" (or a "race hazard"), and happens when result of execute parallel code sections is unexpected and critically dependent on time sequence.
I found out alternative way to enable/disable these keyboard combinations. We don't need wkAntiKeyboardHook plugin anymore.
All we have to do is simple change (or add if doesn't exist) one value in Windows Registry:
Key:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags]
Value:
{deb49ed9-c3fb-49fd-9bb5-bac9f4e7a069}
Change data value from 0 to 1. (screen from Polish version of regedit.exe)
... or just import data from attached file: wa_enable_tab_keys.reg (by double click on it in Windows Explorer):
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags]
"{deb49ed9-c3fb-49fd-9bb5-bac9f4e7a069}"=dword:00000001