Do I need to uninstall a preinstalled os in a new pc build?

[Cenx]

I have a hard drive that I will be using for a new build, but I do not know if I have to uninstall the operating system that is already on the hard drive which is windows 7 home premium 32 bit

 

[Phillip Corcoran]

Yes, since the drive is being married to a different motherboard, the existing windows installation is invalid and won't run.

You need to format the Windows partition on the drive, then re-install Windows on it when you are ready to do so on your new build.

 

[rgd1101]

no need to uninstall it.
first, backup you data,
then install a new copy of the os.

 

[andrei65]

no need to uninstall it.
first, backup you data,
then install a new copy of the os.

What you're saying there is that he backs up the data , format the drive and re-install the os .
So the answer is yes you have to remove it