3 New games - 2 different problems ??

Yesterday I brough 4 games but 3 of them will not work properly on my machine please see below for my spec, the 3 games requirements and the problems with each game.

The 4th game which is Sonic 3D runs great.

Thanks for your help in advance.

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GAME 1

I installed Bubble Bobble / Rainbow Island.

Bubble Bobble
When I run Bubble Bobble my system says 100% CPU is being used and the game runs like I am playing it a very old computer such as a original Pentium...

Rainbow Island
This seems to let me play the game fine.

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GAME 2

I installed Madagascar and when I run the game my system says 100% CPU is being used and the game runs like I am playing it a very old computer such as a original Pentium... What can I do?

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GAME 3

I installed Lemmings revolution but when I tried to run the game it said that a 3D accelerator was not found, I do not unstand what this means and what I can do to solve this problem.

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MY SPEC

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I hope this is all the info on my spec that will be required:-

NVIDIA GeForce2 MX/MX 400
CPU 1.83 GHz
512mb Ram
Nvidia G-force 4 400mX graphics card
NEC DVD RW ND3500 writer
ASUS -- VIA KT400/333 Series
AMD Athlon XP/MP, Model 10, Stepping 0h
WINXP SP2
Master Hard drive 40 GB Free 21 GB
Slave Hard driver 80 GB Free 60 GB

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GAME 1

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Bubble - Bobble & Rainbow islands (On one CD)

Required Spec:-
Windows 98, 2000, ME, XP
Graphics Card 2MB
Processor 450 MhX compatible
DIRECTX 7.0 or higher


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GAME 2

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Madagascar Island Mania

Required Spec:-
Windows 98, 2000, NT, ME, XP
DirectX 9.0
Pentium 111 550 Mhz
Memory 128 MB
Hard Drive 700 MB
CD-ROM 8X
Graphics Card 32MB DirectX Compatible
Sounds Card 16-bit Sound Blaster Compatible

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GAME 3

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Lemmings Revolution

Required Spec:-
Windows 95, 98, XP
Pentium 166
32MB Ram
5M Free disc space
24x cdrom drive
Graphics 4MB