system hangs at the last part of the installation

[Guest]

During installation the system complains that files could not be copied.
These file names are at random. Even if I skip the file, the installation or
setup hangs at the last part of the installation. Sometimes during
installation process the system crashes. If the installation processes
successful after many tries, then it runs unstable. I tried changing the hard
drive. But it is not the hard drive. Would it be the ram?

 

[Rich Barry]

If you can swap out the Ram I would try that first.