I will actually deviate from klswift's response here. There is no more risk with upgrading to Windows 10 on a current PC than downloading an update to your existing Operating System. I have done this upgrade on over 40 computers already and not a single one has issues after install (other than users getting used to the new layout or minor setbacks like jitkaau referenced).
Originally Posted by
jitkaau
Yes, I've tried to download a number of times but it does not finish. Tells me there is an unknown error and that is it. Plenty of memory, so it puzzles me.
In your case, it most likely driver issues. That would require unplugging everything except power cord, rebooting the machine and going straight into the Windows 10 install/download.