Stop 0×7A can be caused by bad sectors in the virtual memory paging file, disk controller error, virus infection, or memory hardware problems.
Another cause of Stop 0×7A messages is defective, malfunctioning, or failed memory hardware, such as memory modules, Level 2 (L2) SRAM cache, or video adapter RAM. If you added new hardware recently, remove and replace it to determine if it is causing or contributing to the problem.
Check the hardware manufacturers Web site for updates to disk adapter firmware or drivers that improve compatibility.
CPU Stability Test
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Hard Drive Tests