The first thing you should do after a new installation is run an update.
You would select the portable setup.
The Windows installation disc should have come with your new computer. If you lost it, contact Microsoft for a new one. Or you can go to a store and buy a new copy.
at the beginning before the start of the actual installation process the installer prompts for this setup
Yes it is safe to delete factory recovery partition if you think that you are not going to use Windows 7 operating system again. But you should have Windows 10 license with an installation disk and your Lenovo computer's drivers in case you need to recover or format your computer.
If you are trying to install Windows XP on a computer with a CD / DVD drive but you do not have a Windows CD, you can make a "ghost" copy of your hard drive. This "ghost" can be used to copy Windows back to a hard drive bit by bit. You should have a fresh / working copy of Windows running first to make a ghost. If you have a CD but no disc drive, you can copy the files onto a network folder on another computer and run the installation program over the network.
winnt.sif
svchost.exe is a system process belonging to the Microsoft Windows Operating System which handles processes executed from DLLs. This program is important for the stable and secure running of your computer and should not be terminated.
That should either be in the windows update or in the installation manual. Usually there are also installation discs that could also help you.
winnt.sif
You should install it after Windows successfully boots.
The i386 folder is contained on a Windows installation disc, and contains all the necessary files to perform an installation of Microsoft Windows.
Click start, then right-click on "My Computer" and select "Properties". It should be under "Windows edition".