Windows 10: Laptop suddenly much slower when unplugged

In the past few weeks, I've found that my VIAO laptop has become much, much slower, especially when not plugged in. It'll often take full minutes to load a site. It's a lot better though when it's plugged in but immediately slows down again as soon as I unplug it, even if it was just at full battery. The battery doesn't seem to drain any faster or slower and it's always on 'best performance.' I haven't changed the settings at all so could have happened to cause this and how do I fix it?

submitted by /u/sadwatermeloon
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:)

 

Laptop Shuts Down when Unplugged

Yes I did, but that didn't work either.

How do I drain my battery? My laptop won't stay on for longer than a couple minutes when unplugged.

Could you please list down the steps for solutions 4 and 5?

Really sorry for the inconvenience, really appreciate the help.

 

Best laptop under $800??

Well the last one I suggested seems to be the best for 650$

EDIT: to facilitate your search...

Laptop GFX benchmark list

Laptop CPU Benchmark list

 

Windows 10 boot suddenly a lot slower

Safe mode unfortunately actually seemed to take even longer to start. I can't put my finger on this. Oh by the way, you nkow when you suggested using the MSCONFIG tool and pressing "Disable All" on the non-Microsoft services? I forgot to take a screenshot of these (for my own reference) before disabling them all, would it be fair to assume that they were all enabled beforehand? (just so I know that clicking on "Enable All" should be fine)

Here are the screenshots from HD Sentinel:











Thanks for your help.