I have been using HP Z800 Server for a couple of years and lately, the Windows clock/time is becoming slow. The time shown on reboot and after awaken from sleep or hibernet is incorrect. This might be caused by a few factors.

CMOS Battery Aging

The CMOS battery is on the motherboard, which records the time and BIOS configurations when the PC is power-off. The CMOS battery will be automatically recharged when the PC is plugged in.

The CMOS aging will make the Clock moving slow. Solution: Replace the CMOS battery – as it is a cheap and effective solution to fix the incorrect time on your system.

Dirt

Dirt damages your computer. Dirt makes your PC malfunctioning that may contribute to a slow clock. Clean the dirt e.g. using your vaccum may help fixing the time.

Windows Time Services

Run ‘services.msc’ by Ctrl + R. Select Windows Time Services from the List. Make sure the ‘Automatic Start’ is selected and saved. Restart the Windows Time Service.

Alternatively, you can restart the Windows Server by using the following two commands:

$ net stop w32time
The Windows Time service is stopping.
The Windows Time service was stopped successfully.

$ net start w32time
The Windows Time service is starting.
The Windows Time service was started successfully.

Synchronise Internet Time

We can configure the PC to synchronise the time from Internet time providers. Launch ‘Date and Time’ in Control Panel. Choose Tab ‘Internet Time’, Change Settings, then Tick ‘Synchronise Internet Time’. You may also click to update the time immediately. You can also choose which Time server to synchronise time from, the default server is time.windows.com

You may run the following command to synchronise the time. You can also add this to the Job Scheduler if you prefer to run it periodically.

$ w32tm /resync
Sending resync command to local computer
The command completed successfully.

We can create a Windows Batch Script to explicitly synchronise the Windows Time periodically.

$ type timesync.cmd
@echo off
:repeat
 w32tm /resync
 timeout 60 > nul  # every 60 seconds
goto repeat

Make the script automatically run on reboot. You can also run w32tm /query /status to confirm the last time synchronisation.

$ w32tm /query /status
Leap Indicator: 3(not synchronized)
Stratum: 0 (unspecified)
Precision: -23 (119.209ns per tick)
Root Delay: 0.0283558s
Root Dispersion: 8.3099902s
ReferenceId: 0x00000000 (unspecified)
Last Successful Sync Time: 27/01/2020 21:33:43
Source: time.windows.com,0x9
Poll Interval: 10 (1024s)

–EOF (The Ultimate Computing & Technology Blog) —

推荐阅读：
小玲和小聪收集各种卡片　 三种水果共有多少千克　 汽车比原计划早到1.5小时到达目的地　 果园里有桔子树和梨树共360棵　 原来定价时所期望的利润是多少元？　 男生人数的40％比女生人数的一半还多3人　 某工厂一、二车间共360人　 将侧面积是94.2平方厘米的圆柱拼成一个近似的长方体　 公交车共有多少张座位?　 新华书店运来书600本