Computer Hardware
What's the best way to prevent damaging your PC with static electricity?

place your PC on a rubber mat
periodically touch a safe ground point on the PC to discharge yourself
wear leather soled shoes
wear an ESD wrist strap

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Computer Hardware
After displaying the directory of a floppy disk, a different floppy is inserted into the drive. The contents of the original floppy continue to display regardless of the director requests on the other floppies placed in the drive. You remove the drive in question and install it into your test system, and it does not exhibit the problem. You should next replace the:

Floppy drive ribbon cable
Original IDE controller
System's floppy drive device driver
System's power supply
None of these

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