Hello Arlyness,
Welcome to PCHF. As long as the HDD you want to install is the additional HDD, and not the one with the OS installed, putting your HDD into her PC won't work unless the PC has identical or similar hardware.
Do you intend to reinstall Windows on the new drive from your PC (in which case I will talk you through if you like),
Or try and fix the problems with the current drive. If so, I will need you to do the following:
- Make sure there is no dust clogging up any of the fans, and that the fans are working properly on the Power Supply Unit and the
CPU.
- Follow the link for PCHF Prework on my signature to ensure there is no malware on the PC.
- Check you virtual memory settings in
Control Panel, System, Avanced. In the "Virtual Memory" section, click on
Change. Try set to "System manged size".
I