Crash au lancement

Bonjour, je vient tout juste d'acquérir en ligne ma version 1.7.9 de minecraft, non seuleument je ne sais pas y jouer mais surtout je ne parviens pas à jouer sur l'ordi de mon fils, une fenêtre s'ouvre:

la page vers laquelle me renvoie "fix the problem" en anglais me propose de mettre mes pilotes de catrte graphique à jour, ce que mon windows 7 me certifie bon, puis "Invalid memory allocation, if you set any Java arguments in your Profile Settings, please remove them" que je ne comprend pas !
j'espére que ma carte mére n'est pas incompatible !!!

Mon systéme extrait du DxDiag:
Operating System: Windows 7 Édition Intégrale 32-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130828-1532)
Language: French (Regional Setting: French)
System Manufacturer: TOSHIBA
System Model: Satellite A100
BIOS: BIOS Version 1.80
Processor: Genuine Intel(R) CPU T2050 @ 1.60GHz (2 CPUs), ~1.6GHz
Card name: Carte graphique VGA standard
Manufacturer: (Types d’écrans standard)
Chip type: ATI ATOMBIOS
DAC type: 8 bit
Device Key: Enum\PCI\VEN_1002&DEV_7145&SUBSYS_FF101179&REV_00
Display Memory: n/a
Dedicated Memory: n/a
Shared Memory: n/a
Current Mode: 1024 x 768 (32 bit) (1Hz)

Extrait du crash log:
-- System Details --
Details:
Minecraft Version: 1.7.9
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_55, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 4650336 bytes (4 MB) / 26808320 bytes (25 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.7.9
LWJGL: 2.9.1
OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
GL Caps:
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Merci d'avance pour votre aide