Reply to Message

Hi there, firstly TPM is Trusted Platform Module, which stores keys for your hard drive encryption using bitlocker(if enabled).
Secondly, considering the age of your system I see that the hard drive controllers are not reading the hard drive, your best bet would be to upgrade the BIOS of your system. Sometime static charge built up on the system could prevent the hard drive from being read, in such case do a power drain on your machine, to do this disconnect the power cabel and press the power button and hold it for 10 seconds and then connect back the power and boot normally.