Nita's post (clipped):--- <<<< The OS appeared to load onto the HD but when rebooted >>>> Normally after the o/s is loaded " windows comes up with [you must restart your computer....}" and I presume the rebooting was this way. <<<< but it acts like it is not reading the HD when rebooted.>>>> Are you able to get into bios/device manager and see whether the HDD is detected? (1) <<<< I have also replaced the internal battery.>>>> (2) <<<<When the internal battery is replaced does it effect settings? >>>> The reasons for(1)is not clear (your system clock not ok?) for(2) if you have not been quick enough (say within 5/7 seconds) then your cmos settings may have been disturbed and may have to be reset. HTH and good day------Venkat Viswanathan The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com