This article was previously published under Q171940
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After you apply Service Pack 3 for Windows NT 4.0, MS-DOS applications mayattempt to access the floppy disk drive when performing I/O operations suchas File Open or File Save. The floppy disk drive light stays lit for aperiod of a few seconds up to a few minutes.
With Windows NT Service Pack 3, the NTVDM subsystem has been updated tokeep in synchronization with Win32. So, when the MS-DOS application changesthe default drive, Windows NT verifies the current directory for the newdefault drive.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Microsoft has confirmed this to be a problem in Windows NT version 4.0Service Pack 3. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.
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