Mulitiple issues, some I thought were resolved. System freezes and I can't start the task manager. (ctrl,alt, delete does nothing). I push the power button to shut down. Takes several tries to reboot. Last time the light on the power button was amber and the system was beeping. Pushed the button again and I finally got it to boot. I've run Dell diagnostics with no errors. Any advice? I didn't get an operating disk with the system. I believe it is about 3 years old, Windows 7, 64 bit. Thank you!
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