Blue screen on client/must kill session?

About all 3 or 4 month the following problem occurs:
The application starts a simple update on a table with only one row, but without commit, to continue in one transaction. Just now the application crashes (without obvious reason) or the client (a PC with windows XP) even gets a blue screen, but no rollback is performed for this transaction . Thus the updated table of the oracle database is blocked until we kill the session of the PC manually.
The mentioned update is performed dozens or hundreds times every day, and usually it works fine. It is very probably that some users try this update in the same time, thus the second has to wait until the first one has committed the whole transaction. The update is the first statement of the transaction to prevent deadlocks.
I don't know, if the application crash or blue screen of the PC causes the oracle problem or, vice versa, the oracle problem causes the blue screen. But once there were blue screens on two PC's at the same time, so there should be a dependency.
We've checked the log files, but there was no error message for this time. But for another day we've found an error, also just for this update statement:
ORA-12571: TNS:packet writer failure
Cause: An error occurred during a data send.
Now we have several questions:
Why doesn't oracle rollback the transaction, if an application crashes? It isn't a good solution to kill the session manually.
Can a simple update bring oracle in such a state?
Can an oracle error crash the application or even windows XP?

Q: Why doesn't oracle rollback the transaction, if an application crashes? It isn't a good solution to kill the session manually.
A: If ORACLE can get the information, that the client process is dead, than ORACLE can rollback the transaction
Q: Can a simple update bring oracle in such a state?
A: No
Q: Can an oracle error crash the application or even windows XP?
A: It's possible that the application crashs, but not Windows XP. An OS should prevent a client application to stop the OS.
Regards
Marc

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Q: Why doesn't oracle rollback the transaction, if an application crashes? It isn't a good solution to kill the session manually.
A: If ORACLE can get the information, that the client process is dead, than ORACLE can rollback the transaction
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Regards
Marc

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Thank you for posting in Windows Server Forum.
As per my research, you need to run the command although video adapter is disabled on motherboard. If you install the RemoteFX cap driver, the integrated video adapter is disabled while the operating system is running.
For more information you can refer beneath article.
1. RemoteFX (with Hyper-V) is a serious business tool. For games.
2. Configure RemoteFX in Hyper-V running Windows Server 2012 with low end GPU
Hope it helps!
Thanks.
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