I have a problem During the installation process OMA LX3 i586, the installer has not started the process, and restart the PC
after a few seconds the PC is rebooted
Sound like bug report is in order. Also if your hardware allows could you try installing x86_64?
Edit: Silly me. Forgot to ask critical question is this in VirtualBox or other VM or on hardware?
cpu: AMD Sempron™ Processor 3400+ (MHz): 1800.000
card: NVIDIA C61 [GeForce 6100 nForce 405]
In the interest of you getting OpenMandriva Lx 3.0 on your computer. This hardware (AMD Sempron™ Processor 3400+) supports x86_64 arch. Lx 3.0 was developed in x86_64 environment (most everything is nowadays) and will work better with x86_64 OS. i586 is intended only for hardware that can’t run x86_64.
That being said we do want to get our i586 install issues resolved so thanks for reporting.