@juhful I'm also confused about how exactly MS manages upgrades from 7/8.
@yesnoo Yes its a good config. I guess the upgrade is slow because of the 4GB RAM.
Hey sloth thanks for reply. Does that option mean that everything will be removed and a clean image of Windows 10 will be installed in place?
Yes, when you upgrade and "uncheck/disable" the "keep windows settings, personal files and applications", you should get a fresh installation. But I'm not sure if it will be as clean as an installation from the retail ISO.
But once you upgrade, you can perform a clean install. But to do that, first you have to do the upgrade so that your Win7/8 license is transferred to Win10.