This article was previously published under Q179827
After a fairly long period of continuously using Attachmate Extra V6.3, thecomputer displays blue screen errors randomly.
These blue screen errors are caused by an application containing a registryhandle leak. This leak occurs because an application continuously reopens aregistry key but never closes it. After this has happened 65,535 times, theopen instance count for this key wraps round to zero making the kernelthink that there is no longer any open handles to this key. The next timean instance of the key is closed, the storage used by the kernel toreference the key is deleted.
However, any time subsequent to this that the key is opened or closed, thefreed storage is written to again. This causes free pool corruption andeventually the system will crash when this freed storage is referenced inany way.
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 that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. 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.