HP Pavilion DV7-3174NR Running Very Slow

lakeober

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Jun 12, 2012
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Hello, I am currently having an issue diagnosing a problem on an HP Pavilion DV7-3174NR entertainment PC laptop. It is a fairly new machine (probably only 1-2 years old), has 6gb of RAM, and a 500gb hard drive, running Windows 7 Home Premium 64-bit. Also, it is a refurbished machine from the factory. A friend of mine brought this laptop to me hoping that I could fix it. He bought it about a year or so ago, and like I said, it is a refurbished laptop. It worked fine for him up until recently when he was using it to email a large file to someone, when the machine froze up and had to be manually shut-down (by holding the power button). Then, when it was restarted, it would bring up a black and white screen in the boot manager asking how to boot (safe mode, normal, etc). Whenever you select an option, it would bring up the Windows load screen, but then it would bring up a black and white screen saying that some driver was missing, and then would take you back to the screen asking how you want to boot. No matter what option was selected, it would do the same thing.

So, I decided it was probably some type of hard drive failure. But as a last resort, I tried to reload Windows 7. Low and behold, I got it to reload Windows 7 from my disc, and now boots up properly. However, now the computer is running VERY slow and lags when trying to do anything…. Often the windows will become unresponsive and you will have to shut down the machine. Also, it will run normal for about the first 1-2 minutes, but after that it gets worse and worse. Also, the bottom of the machine is getting pretty darn hot. I’m not sure if this is representative of a problem, or this machine just runs really hot. But anyways, now I’m not sure what is wrong. Could it still be a hard drive issue even considering that it is now running Windows (even though very slow)? Is it something like a faulty motherboard or faulty RAM? I’d appreciate any help you can provide. Thanks!
 

mfenn

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Jan 17, 2010
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Probably a bad drive. Sectors on a drive can be good (able to to be read on the first try), marginal (able to be read after several retries), or bad (unable to be read at all). When drives die, they usually develop a bunch of marginal sectors in addition to the bad ones.

So, what I would guess is happening is that there was some critical driver or whatever on a bad sector before, but when you reinstalled Windows, it wrote to different sectors. However, some of those sectors are marginal, so it has to retry them and slows everything down to a crawl.

It could be heat, but most reasonably modern machines with enough RAM will keep Windows snappy even if they're completely throttled. It's easy to test temps with HWMonitor.
 

lakeober

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Jun 12, 2012
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Awesome... thanks a lot for the information! I am leaning towards it being a faulty hard drive as well, but just wanted to seek some professional help before I go buying a new one. I hooked it up to my business laptop using a SATA to USB adapter and ran an HD analysis. It can up with some errors, so I am assuming that is where the problem lies. Thanks again!
 

mfenn

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Jan 17, 2010
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No problem! Being refurbished, it is probably out of warranty so your friend is going to have to fork over for a new drive.
 

lakeober

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Jun 12, 2012
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Well, I suppose that's what he gets for buying a refurbished computer. I would personally never recommend someone buy one. It's not worth the risk for the often small amount that you save.
 

mfenn

Elite Member
Jan 17, 2010
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Yeah, the Dell Outlet is the only place I'd buy refurbished from. That's because they offer the standard new computer warranty on all PCs you buy there.