Computer Hardware
After installing a sound card, the system locks up when a parallel port tape backup unit is also used. What is most likely the problem?

defective LPT port
DMA
IRQ
defective tape driver

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Computer Hardware
You run a super wing-ding diagnostic program on your PC, and it reports that your hard drive, microprocessor, RAM, and video card have seen better days. To resolve this problem you should:

replace each part one at a time, rerunning the diagnostic before replacing the next part.
get another copy of the diagnostic program
check to see if you have a software problem
replace everything at once and rerun the diagnostic
run an exhaustive memory check

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