I have:
Motherboard: DG35EC
Processor: Intel Dual Core E2180 , 2.00 GHz
Hard disk: 500 GB - ST3500418AS
RAM: 1 GB
For 2 weeks now, I am facing this strange issue. Whenever I run some heavy programs simultaneously computer suddenly turns off after some time. For example, before posting this question, I was running Opera with many tabs open and started installing huge software. While working in opera, I noticed that the system is getting heavy utilization due that installation. Before the installation completes, it turned off suddenly. I cannot just do a single task at a time, but after failing installation third time, I have a plan to run it after closing all other programs. .