How to get a standalone Windows 7 installation to synchronise time (NTP)

I am trying to get my Windows 7 Professional machine to synchronise time correctly. This laptop is not a member of any Windows domain.

If I try to go to the clock settings, Internet Time tab, and click on "Update Now", it tells me that an error occurred. Misc. commands / output from my system is below.

What else can I try?

w32tm /monitor /domain:time.windows.com

GetDcList failed with error code: 0x8007054B.
Exiting with error 0x8007054B

w32tm /query /configuration

[Configuration]

EventLogFlags: 2 (Local)
AnnounceFlags: 10 (Local)
TimeJumpAuditOffset: 28800 (Local)
MinPollInterval: 10 (Local)
MaxPollInterval: 15 (Local)
MaxNegPhaseCorrection: 54000 (Local)
MaxPosPhaseCorrection: 54000 (Local)
MaxAllowedPhaseOffset: 1 (Local)

FrequencyCorrectRate: 4 (Local)
PollAdjustFactor: 5 (Local)
LargePhaseOffset: 50000000 (Local)
SpikeWatchPeriod: 900 (Local)
LocalClockDispersion: 10 (Local)
HoldPeriod: 5 (Local)
PhaseCorrectRate: 1 (Local)
UpdateInterval: 360000 (Local)


[TimeProviders]

NtpClient (Local)
DllName: C:\Windows\system32\w32time.DLL (Local)
Enabled: 1 (Local)
InputProvider: 1 (Local)
CrossSiteSyncFlags: 2 (Policy)
AllowNonstandardModeCombinations: 1 (Local)
ResolvePeerBackoffMinutes: 15 (Policy)
ResolvePeerBackoffMaxTimes: 7 (Policy)
CompatibilityFlags: 2147483648 (Local)
EventLogFlags: 0 (Policy)
LargeSampleSkew: 3 (Local)
SpecialPollInterval: 3600 (Policy)
Type: NT5DS (Policy)

VMICTimeProvider (Local)
DllName: C:\Windows\System32\vmictimeprovider.dll (Local)
Enabled: 1 (Local)
InputProvider: 1 (Local)
NtpServer (Local)
DllName: C:\Windows\system32\w32time.DLL (Local)
Enabled: 0 (Local)
InputProvider: 0 (Local)

w32tm /query /source

Local CMOS Clock

w32tm /monitor /domain:time.windows.com

GetDcList failed with error code: 0x8007054B.
Exiting with error 0x8007054B

w32tm /monitor /computers:time.nist.gov

time.nist.gov[192.43.244.18:123]:
ICMP: 439ms delay
NTP: +11.0631836s offset from local clock
RefID: 'ACTS' [0x53544341]
Stratum: 1

Warning:
Reverse name resolution is best effort. It may not be
correct since RefID field in time packets differs across
NTP implementations and may not be using IP addresses.

Mine works fine. The only real differences I could spot if I ran w32tm /query /configuration was that I don't get anything with (policy), and rather than type nt5ds, I get ntp.

Sorry, I don't know much about how to fix it, but hopefully that may be a starting point.