i am new pc user .i disscuse my all problem i have intel i5(4670),4GB Ram, 1 TB Hardisk and motherboard intel DH87mc.WHEN I BUY MY PC engenier came instal windows 7 at time of instalation electrick power is off then when electicity come on he copy only those file who does not copy.at the time of instalation i dont know about pc.now copy speed of my pc is 1mb or 2mb per second pc to pendrive.i have antivirus k7 and bluesatack. to increase copy speed what can i do change windows if i change my window which operating system i use for multithreading or multitasking or dowanload new drive of motherboard dh87mc