Should i upgrade or get a new computer?

[YoutubaHD]

What should i do heres my specs:
Operating System: Windows Vista™ Home Premium
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 5600+ (2 CPUs), ~2.8GHz
Memory: 2942MB RAM
DirectX Version: DirectX 10
graphic Card name: NVIDIA GeForce 6150SE nForce 430
Display Memory: 1336 MB
Monitor: Generic PnP Monitor
Drive: C:
Free Space: 5.2 GB
Total Space: 467.9 GB

My computer has problems like when i play minecraft it uses the whole cpu i need this fixed. thanks for the help everyone

 

[Andrew Barber]

GET A NEW PC YOURS HAS BEEN SPOILED BY VISTA