This is a very vague question. It could be anything. A scratch in the Windows CD, a dirty CD ROM drive (yes, they periodically need cleaning!), hard drive failure, etc.
Update Win98 from the Microsoft website that should help.
You don't. The only way to change the base language in Windows (start button, menus etc) is to reinstall windows with a disk in the language you require.
Reinstall it.
Windows 98 home publishing is for Windows 98. Windows 98 programs don't work well on Windows XP sometimes.
There are no unique features of Windows 98, nothing is unique about Windows 98.
Windows 98 does not include a firewall.
What is the difference between windows 3.11 and and windows 98
Windows 98 has a very unreliable file system (FAT32) and does not actively protect against system files becoming damaged or deleted. If the system is still usable, you can restore them by going to Start > Programs > Accessories > System Tools > System Information, and selecting Tools > System File Checker. If the system is unbootable, you can reinstall Windows 98 without losing any data.
Yes.
"Windows 9x" is the collective term for all operating systems in the 16/32-bit hybrid family. These are Windows 95, Windows 98, Windows 98 SE, and Windows ME. Windows 98 refers to a specific member or two members of this family.
There is no specific printer that you "need" for Windows 98. Any printer with a Windows 98 driver should work.
No - after Windows 98 came Windows Me & Windows 2000 - then Windows 7.