Laura's Happy Adventure Recommended System Requirements:
Windows 95/98
DirectX 7.0a - highly recommended
Pentium 200 MMX
64 Mb RAM
16 Mb Direct 3D compatible graphics card
8X CD-ROM
Sound card; Mouse; Keyboard
Laura's Happy Adventures has been tested and found to work correctly on the following chipsets. If you are unsure of the chipset that is on your video card, contact either your computer manufacturer or the manufacturer of your video card.
3DFX, Voodoo, Voodoo 2, Voodoo 3, Voodoo 4
Voodoo Banshee, Voodoo Rush
INTEL= i740
ATI= Rage Pro, Rage 128
Matrox= G200,G400
Nvidia= Riva 128, Riva 128zx, Riva TNT, Riva TNT2
GeForce
S3= Savage 3D, Savage 4
I'm sure your problems actually have nothing to do with Windows 98 unless specified by the game software. Games are often very hard to setup and troubleshoot. The newer games require extensive system resources.
As Chas has correctly stated your system may not meet the minimal requirements to run the game. Also often the minimal requirements will barely run the game. It would help to know more about the rest of the system. CPU and amount of ram. Also some games don't support all video cards and others may have update patches. The video settings can have an effect too. What is your colors and screen resolution set to. Example would be 16bit color at 800X600 resolution.
Use the help files that came or check the CDROM that came with the game for troubleshooting files.