"Unlock computer" feature

[Gintaras]

1. Windows 2000/XP, when shows dialog with user name and password fields:
Au (USERNAME) Ap (PASSWORD) Y

2. Windows XP, welcome screen, when initially shows password field:
(PASSWORD) Y

3. Windows XP, welcome screen, when initially does not show password field. Examples for user 1, 2 and 3:
TT (PASSWORD) Y
TTD (PASSWORD) Y
TTDD (PASSWORD) Y

4. Windows Vista/7. Examples for user 1, 2 and 3:
V (0.5) B (PASSWORD) Y
R V (0.5) B (PASSWORD) Y
RR V (0.5) B (PASSWORD) Y

5. Windows Vista/7, when initially shows password field:
(PASSWORD) Y