After installing two memory modules, you power on the system to check for errors. You find that the BIOS program recognizes only one of the memory modules.
While troubleshooting this issue, which of the following is BEST to try first?
Reboot the computer and run memory diagnostic tests on the memory.
Scan for new devices in Device Manager; enable any disabled memory modules.
Make sure that both modules are seated properly in their slots.
Change the memory timings in the BIOS to a slower (higher) setting.
Return both modules for a replacement.