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Windows suddenly very slow, ruled out virus/malware


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#1 btkuhn777

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Posted 26 July 2016 - 07:40 PM

Hi there,
 
My 5-month old Dell Laptop running Windows 7 began running very slowly about 4 days ago, and I can't figure out why. Even basic tasks like web browsing, viewing videos, using itunes, etc are much slower than usual and video is choppy and unwatchable. I've tried the following troubleshooting steps:
 
Ran Avast full scan
Ran malwarebytes
Checked startup programs, nothing unusual, and very few programs start on system boot
Ran Windows update
Checked device manager, nothing out of order
Deleted temp files. My hard drive is not close to full.
Disk defrag already runs weekly
Ran chkdsk to test for hard drive issues
 
When I open task manager to see what's using CPU, it's not anything abnormal - if I have chrome open with 4 tabs, each chrome process will be using ~20 percent of the CPU, roughly evenly distributed. If VLC media player is open it will use 40 percent or so and then Chrome will be using less. But the total stays around 100. This is abnormal - normally, I can have 20-30 tabs open easily with no performance issues, along with itunes, vlc, etc. This slowness persists even when I have hardly any programs running. I've tried using firefox rather than chrome, no difference.
 
I have not recently installed any software. The only thing that is at all somewhat abnormal is that my battery seems to be getting ready to die - I've been getting messages that it's charging, but needs to be replaced. However,there is no difference in speed or performance even if I remove the battery, use only the powercord, and reboot.
 
Any ideas? I don't know what else to try other than a complete refresh and reinstallation of windows, but I'd prefer not to do this if possible.
 
Thanks!


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#2 btkuhn777

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Posted 26 July 2016 - 10:23 PM

Ok, I'm an idiot. I was using the wrong AC adapter, and I guess not providing adequate power to the computer. Switched it back and it's fixed. Please disregard.



#3 sankalppatil

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Posted 27 July 2016 - 05:33 AM

Commonly this happens when a hard drive returns to PIO mode after Windows chooses it has seen a couple of blunders from the drive. You can confirm this by taking a gander at the properties of the IDE Controller to which the drive is associated in gadget director.



#4 dc3

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Posted 27 July 2016 - 08:38 AM

Commonly this happens when a hard drive returns to PIO mode after Windows chooses it has seen a couple of blunders from the drive. You can confirm this by taking a gander at the properties of the IDE Controller to which the drive is associated in gadget director.

Apparently you missed the post previous to yours.  The OP stated that they had resolved the problem.


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