Need to know your Processor (CPU) made by AMD or Intel, and the model (example AMD Sempron or Athlon, Intel Celeron, P4, Core2 Duo) Also how much RAM you have (2Gb, 4Gb ) and the make of your Motherboard (Asus, MSI, Asrock) plus model Number. What language do you prefer? Maybe Google translate will help...
Even without knowing any more I think your PSU is too small to power the GPU...
Windows 7 Home Premium
Manufacture: Hewlett-Packard Company
Processor: AMD Sempron(tm) 140 Processor 2.71 GHz
Installed Memory (RAM): 3.00 GB
System type: 64-Bit Operating System
Pen and Touch: No Pen or Touch Input is available for this Display
Nvidia Installed: GeForce 9400GT 1GB DDR2 PCle 2.0
Old Nvidia: 6150SE nForce 430