Here are my specs:
OS:Windows 7 Ultimate x86.
CPU:Intel Core 2 Duo E8400 3.00 GHz.
Video:Nvidia 8800 GT 515 MB RAM.
GPU:4,00 GB (3,25 usable)
HDD:1.Hitachi HDP725032GLA360 ATA Device. 300 GB.
2.HDS721050CLA362 ATA Device. 465 GB.
Here are HD Tune specs: http://postimg.org/image/ho645ily7/
and http://postimg.org/image/cwuzgqcr1/
Also,my PC hangs usually on the first possible screen after turning it on: http://postimg.org/image/ik3m527jp/
Sometimes, it passes through it but freezes on this one: http://postimg.org/image/41vxu4bhf/
After a reboot, the PC usually starts working, but sometimes I have to reboot several times in order to be able to proceed to the OS.This issue has been appearing ever since I bought the PC. I hope you can help me.