my computer will only search one of my hard drives

hello, i recently built my computer and it has four hard drives, a new SSD, and three HDDs all taken out from my old computers. when i open my start menu and type something in only the results from the SSD will come up, how do i fix this, also all my old HDDs still have their operating system on the i never bothered working out how get rid of them.

Check whether all hard drives have their allocated drive letters. or else check all drivers are visible in "My computer".
Do you use Windows XP or Windows 7?
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Please enter in your windows search box, disk management and post a snip of what it shows.

Also, check to make sure that all are set to be indexed. Right click each hard drive in my computer, and select properrties. Around the bottom of the window that opens there should be a check box that opens.