Hi everyone, I bought my Pc about year and that time it was working fine, but one day when I was shifting to Uae, I brought my Pc too, I packed it well but didn't remove my hard drive and rams. Now like after few months of using my Pc hangs and shuts down, why is it ? My specs are Hp dc7900 Intel Core2Duo 3.33, 4 Gb Ram and power supply is about 300 W