This desktop unit is "I think" a Dell machine, no sticker anywhere and the front panel is missing. I came with 2 HDD's, a Samsung IDE which is damaged and a Sandisk SSD drive [small thing like the size of a credit card], apparently win7 was loaded on it before but now on bootup I am getting the "NTLDR is missing. Press ctrl+alt+delete to restart" and win7 will not load, the CDRom option is selected in the boot options. I had attached the SSD drive as a slave on another machine and no issues navigating through it so the drive seems fine, any ideas why win7 won't load on it or what else I can try please?