System restore like in XP is not in 98se however…
Windows 98 takes periodic snapshots of your system configuration and saves them in a part of the Operating System that can be accessed from the Command Line.
If U want to RESTORE your system:
Start system and keep the Ctrl key held down until the window is gray/white (safe mode) and U see a menu including Normal (1), Safe (3), and Command Line Prompt (5). Choose Command Line Prompt by hitting the 5 key on keyboard.
At the C:\ type in: scanreg /restore and press Enter
The computer should present a list of dates.
Choose the most recent date before U had problems and hit Restore. From there everything should work fine. Otherwise, be prepared to bring computer in for service.