PRECISION T7600 NOT SHOWING HARD DRIVES

If it has a Perc raid controller installed and the drives are connected to it, you will need to dowload the driver and load it at the early stages of the windows installation.

Could you let us know if a raid card is installed ?

Also check in the bios if all sata ports are enabled 

The school probably wiped the drive clean. Boot to your windows installation usb drive or disk. Choose the unallocated drive partition to install windows. Do the same if you installed new drives. Note-You will have to delete everything on any used drive you install.

HELLO THERE.. THERE ARE NO RAID CARDS INSTALLED AND I CHECKED THE BIOS AND ALL PORTS ARE ENABLED

Ok so :

1) traces of a card being removed ?

2) are there cables not plugged inside ? check around the sas0 / sas1 connectors on the motherboard bottom

NO TRACES OF A CARD BEING REMOVED.. I CHECKED ALL CONNECTIONS AND IT SEEMS TO BOOT UP TO A HARD DRIVE I TOOK FROM ANOTHER PC THAT HAS WINDOWS TEN ON IT BUT I GET THE BLUE SCREEN OF DEATH WHEN I TRY BOOTING WITH THAT DRIVE..

try disabling secure boot, and change to uefi ( not legacy boot )

oh ok i didnt know about the failsafe.. i let the bluescreen come up about three times but i got the option to recover it tells me to select the operating system to recover and hit recover but i dont know how to select the os because it dont show up.. yes i have secureboot enabled and i have it set to legacy boot.. 

im not sure what you mean. im pretty good at using computers but when it gets technical i have no knowledge whatsoever

Sorry. Win10 has a failsafe that would give the option ( or launch directly ) the recovery mode while booting, if the boot fails enough times.

From there is the usual safe mode boot, or normal boot, or etc

Anyway : other computer is set as uefi or bios ?
This 7600 is set as uefi or bios ? ( you can see it in the bios , F2 )

let it boot / crash until it enters recovery mode ?