PAE means Physical Address Extension, is a memory management feature for the x86 architecture. It allows these CPUs to directly access a physical address space larger than 4 gigabytes.
NX means no-execute, is a technology used in CPUs to segregate areas of memory for use by either storage of processor instructions (code) or for storage of data. An operating system with support for the NX bit may mark certain areas of memory as non-executable. The processor will then refuse to execute any code residing in these areas of memory.
1.change CPU to PAE/NX supporting
2.Update kernel at least 2.6