For this, you should format disk and then move Windows 98's boot disk files to drive. Creating USB drive bootable permits you to run diagnostic tools when there is problem with hard drive.
It's vital to remember that not all PCs can boot to USB, and not all Kingston USB drives are bootable. You must not format contents of USB drive before you first ensure PC able to boot Kingston drive.
Download Windows 98's boot disk files to vacant folder. Download and run HP USB Disk Storage Format Tool.
Put in Kingston USB drive into accessible USB slot. From "Device" drop-down, choose Kingston USB drive. If you have above one USB drive inserted into PC, ensure you choose right dive.
From "File system" drop-down, choose "FAT32". Check "Quick Format" and "Create a DOS startup disk."
Choose "Using DOS system files located at:," then click "..." button to browse files and folders. Choose folder with downloaded Windows 98 boot disk files, then click "OK."
Click "Start" to format Kingston USB drive. This removes all files on drive and changes them with boot disk files. Click "Yes" when warning dialogue box emerges.
Reboot PC and access BIOS setup screen. Modify motherboard's boot priority to Kingston USB drive.
Save settings and exit BIOS screen to boot to USB.