Win98SE - processor usage 100% - why?

[RainyShadow]

You could check if SpeedFan is able to slower your fans.

HTH

[Countach69]

You may want to lubricate your fan or better yet replace it; do it yourself or have it serviced.

The fan is probably not able to cool your laptop adequately because it's only spinning at, lets say 1500 RPM (Revolution Per Minute), instead of 2500 RPM (hypothetical numbers) thus remains always ON. The fans is also making noise because it's either old, needs lubrication or something is rubbing against it; an unlubricate defective 40mm fan can emit a VERY loud sound!

Countach