Hi Slomo,

You can easily create and use a Bootable USB Pendrive  to install Windows 8 on your PC. The process of creating a Bootable windows 8 USB is fairly easy, however you will have to download a copy of windows 8 ISO file.

Microsoft provides Windows 7 ISO images as free downloads to the public. You can download Windows 8 iso from here. 
Once you have downloaded a Windows 8 ISo file, you can then follow the instructions provided below to create a Bootable windows 8 USB flash drive.

1. Download Rufus and run it with Administrator rights.

• Step 1: Select the USB drive.
• Step 2: Select “ Select MBR partition scheme for BIOS or UEFI “ ( Note: If your PC has UEFI bios, select the other two options. )
• Step 3: Select NTFS for File system. ( Note: Select FAT32 if your PC UEFI bios. )
• Step 4: Select the default Cluster size.
• Step 5: Type in a name for the Bootable USB Flash Drive.
• Step 6: Make sure you select these three options under Format options.

1. Quick Format
2. Create a Bootable disk using.
3. Create extended labels and icon files.

• Step 7: Select the dropdown menu next to Create a Bootable disk using and select ISO Image.
• Step 8: Select the Drive icon next to ISO Image and then select the Windows 8 ISO file.
• Step 9: Verify all the settings and then click on the Start button.

That’s it, now you’ll just have to wait for a couple minutes more and the Windows 8 Bootable USB Flash Drive should be ready for installing Windows 8 on your PC.
Reboot your PC and set the bootable flash drive as a first boot priority in the bios settings. Save the bios settings and reboot once again to continue with the windows 8 installation process.

I hope this helps in installing Windows 8 successfully. If you face any issues, let me know and I will provide further assistance.

Regards,
Lokesh