Mobo changed and when strat a common message popup "reboot

hi guys,
i changed my liptop mobo ,before a week and now i am got a problem when i start my pc then i see in blce screen with some white words."reboot or select a proper boot device etc,....
i used my hdd in another liptops and its working properly as well as it activated on other other liptop too.
if the erorr is for changing the mobo then why its working on other pc.
guys any have a solution of that problem then plz reply me
my pc details:
Toshiba satllite c850 with window 8
of 320 gb HDD and 4gb ram,
core i3 2.20 ghz

Is the other laptop the same exact model ?

If you replaced the motherboard with the same model, Windows should boot. Make sure the hard drive is properly installed.

Does the bios see the hard drive ?

If all still fails...... Re Install windows to the new motherboard.

http://www.eightforums.com/tutorials/2299-clean-install-windows-8-a.html

hi ,dear thanx
it was the samsung core i3 ,..not the exact model,
with other hdd installed properly and detecting in bios,..
when i try to clean reinstall then it making another problem :
"window cannot be installed to this disk the selected disk is of the gpt partition style"
a brand new problem..
waiting for reply

Convert GPT Disk to MBR Disk - Windows 7 Help Forums

http://www.eightforums.com/tutorials/2299-clean-install-windows-8-a.html

Disable secure boot in the bios.

Disable UEFI and choose Legacy boot.

Delete all partitions during the install and you shouldn`t have any more problems.

yah i do that ,
know here its a fresh window but not activated becouse ,i oss my all partition which includ my oem and recovery partition ,how i recover them ??