When you start a VM in VMware Workstation, you get this warning:
The keyboard hook timeout value is not set to the value recommended by VMware Workstation.
Basically a keyboard hook is what VMware uses to know (through Windows) that the user has pressed a key. So, if the keyboard hook timeout value is too high, VMware Workstation may lose keystrokes as it doesn’t pass the keystroke through to the VM in time before it times out. This can happen on a slow PC or if the PC is under a lot of stress (high workload).
It’s safe to accept the updated keyboard hook value from VMware Workstation and is recommended to click OK to this message.