For Windows 2008 and higher:
psexec -s -i -d cmd.exe
C:\Windows\system32>whoami
nt authority\system
-- List the session 0 tickets (0x3e7 is the machine session 0)
klist -lh 0 -li 0x3e7
-- Purge the session 0 tickets
klist -lh 0 -li 0x3e7 purge
Should display:
Current LogonId is 0:0x3e7
Deleting all tickets:
Ticket(s) purged! 