I just purchased some brand new PC parts for a from a repuatable supplier. Got my local shop to fix the items together to make me a fully working pc. I wanted to install the operating system myself as its not the hardest job in the world to install and update windows. Got the pc home witihin 20 minutes of use i had the screen freeze, no movement of anything so reset and started again since last night this happened 20 times approx. It has now gone back to the shop for further testing. I am responsible for the costs involved or should I expect a pc that works for what i paid to have in the first place? They have had the pc since 9am this morning and want to keep hold of it until lunchtime tomorrow how long does it take to fully test a pc?