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After you install Windows NT 4.0 Service Pack 4 and then use Remote Access Service (RAS) over an analog or ISDN telephone line, you may encounter lower-level packet corruption which results in a STOP 0xA error message being displayed. This error message occurs in Ndiswan.sys.
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:
152734 how to obtain the latest windows nt 4.0 service pack
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: