It may be due to having so much RAM in your system. The default Auto values in the BIOS for RAM controls are set assuming 4 GB or less of RAM. To provide support for more ram, manual tweaking of those settings must be done. Please download and install CPUZ
and Upload screenshots
of the CPU, Mainboard, Memory, and SPD tabs.
Also, go into your BIOS and post all RAM and CPU Voltages and all RAM settings (timings, frequency, etc.) Thanks to Dave76 for help learning RAM Stability
Also, if you are overclocking any hardware, please stop.
You may also be interested in reading the Quote by usasma
regarding SSDs in post #2 of Randomly Reoccurring BSOD - ntoskrnl.exe
Also, what network adapter are you using for the system that is locking up?
Please follow the http://www.sevenforums.com/crashes-d...tructions.html
to provide us with more information regarding your system and possible conflicts (these instructions do more than help with blue screen crashes).