Article ID: 194749
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Windows NT version 4.0 Service Pack 4 (SP4) systems access the hard disk approximately every five minutes. This access interferes with Power Management. For example, if your hard disk spins-down after a few minutes of inactivity, the hard disk will spin-up every five minutes.
The Event Log service in Service Pack 4 maintains a time stamp on the hard disk. This time stamp is used to approximate system shutdown time whenever Windows NT is not properly shut down. By default, the time stamp is updated every five minutes. This feature was intended to operate only on Windows NT Server systems. Unfortunately, it is also enabled by default on Windows NT Workstation systems.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
Microsoft has confirmed that this is a problem in Windows NT 4.0 Service Pack 4. This problem was first corrected in Windows NT 4.0 Service Pack 5.
This hotfix adds the following to the registry:
with the following value:
Value Name: TimeStampInterval Data Type: REG_DWORD Value: 0