This is the 2nd PC which was suppose to be the exchange of my previous return. I originally purchased 3 pcs and since 1 was defective I opted for an exchange of that 1 with another from you. However, even this one turned out to be a dud PC - every time I boot, it gives me a warning that the power supply is insufficient, and even bypassing it causes the PC to slow down - as shown in the attached picture.