Hi Rick,
Thank you for your response.
I run the WhoCrashed and here is the report
Crash Dump Analysis
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Crash dump directory: C:\Windows\Minidump
Crash dumps are enabled on your computer.
On Sun 16-Jun-13 4:18:41 PM GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: Unknown (0x00000000)
Bugcheck code: 0x7A (0xFFFFF6FC40009860, 0xFFFFFFFFC000009D, 0x62637860, 0xFFFFF8800130C648)
Error: KERNEL_DATA_INPAGE_ERROR
Bug check description: This bug check indicates that the requested page of kernel data from the paging file could not be read into memory.
A third party driver was identified as the probable root cause of this system error.
Google query: KERNEL_DATA_INPAGE_ERROR
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Conclusion
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One crash dump has been found and analyzed.
Read the topic general suggestions for troubleshooting system crashes for more information.
Note that it's not always possible to state with certainty whether a reported driver is actually responsible for crashing your system or that the root cause is in another module. Nonetheless it's suggested you look for updates for the products that these drivers belong to and regularly visit Windows update or enable automatic updates for Windows. In case a piece of malfunctioning hardware is causing trouble, a search with Google on the bug check errors together with the model name and brand of your computer may help you investigate this further.
Waiting for your response.