According to Microsoft If the virtual machine's clock is running fast, then the Hyper-V Time Synchronization Service will bring the clock back into sync with the Hyper-V server.

The clock in your Windows computer can be configured to sync with an Internet time server, which can be useful as it ensures your clock stays accurate. In cases where your date or time keeps ...

For some reason the last week my computer clock has been fast. We sync our clocks during login but I don't hardly ever log out. Just to test it I synced my clock when I left on Friday and this ...

If your computer can't keep good time, it may be due to Microsoft's crummy time server. Here's a replacement that should do the trick.

Rick answers reader e-mail about a computer clock that's slightly off, a Windows XP system that won't shut down, and troubleshooting slow Wi-Fi connections.