Hello all I have server with windows server 2003 R2 64bit with oracle11g RAC the server restart periodically with blue screen as you can see in the error below : Event Type: Warning Event Source: USER32 Event Category: None Event ID: 1076 Date: 12/20/2010 Time: 7:58:21 AM User: XXX\administrator Computer: XXXX2 Description: The reason supplied by user XXX\administrator for the last unexpected shutdown of this computer is: System Failure: Stop error Reason Code: 0x805000f Bug ID: Bugcheck String: 0x0000ffff (0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000) Comment: 0x0000ffff (0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 0f 00 05 08 .... Any Idea about this error ?

Check whether memory dump is generated in that server

Hello HEMO_IQ, Please try to update TCP/IP driver to check if the issue can be resolved. The TCP receive window autotuning feature does not work correctly in Windows Server 2008 R2 or in Windows 7 http://support.microsoft.com/kb/983528 If the above suggestion does not resolve the issue, please understand that debug and dump analysis may be required for further troubleshooting. Also, in most cases, it is necessary to check the source codes. However, debugging is out of our forum’s support boundary. A support call to our product service team is needed for the debugging service. In this case, I’d like to suggest contacting Microsoft Customer Support Service (CSS) for assistance so that this issue can be resolved efficiently. To obtain the phone numbers for specific technology request, please check the website listed below: http://support.microsoft.com/default.aspx?scid=fh;EN-US;PHONENUMBERS Thank you for your understanding. BrentPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.