My computer started rebooting when ever it would come up to the windows screen or otherwise would just never load. So I reinstalled windows. Three days later I boot it up and it says Reboot and select proper boot device. So I checked the bios and it has the hdd as the first boot option. When I restarted it came up with the option for safe mode or normal, either one I chose it would begin loading and than reboot to give same message. I reinstalled windows and it ran fine for three days, after I booted it up a second time windows ran slow, so I restarted and again it's having the same issue with it saying Reboot and select proper boot device.
OS: windows 7 home ultimate. Ram: 3 gb Hdd: sata 500gb Processor: pentium core duo 2.0 ghz