REOPENING QUESTION: Screen res changes from 100% to 25% often

Two Experts and I thought this was solved. It is not. Here are some of the facts:
1. Computer is  a Dell M4800 workstation laptop with premium 3200 x 1800 display.
2. I have always had it set at native resolution and magnification set to 200% which is the recommended setting.
3. When opening most any website it will be normal resolution. When I click to most  any other linked site the res goes down to an unreadable 25%. Both Chrome and Firefox exhibit this problem.
4. I have already  removed ALL  extensions and rebooted but the problem still shows up.
5. If,  when it is showing in 25% i change the setting to 100% and return to the  previous  page  the previous page still is OK at 100%, but when returning to the previous page I find that it has reverted back to  25%.
6. In the hopes my video driver was out of date I did install the latest version Nvidia. It did not make any difference.
7. Nothing else seems be be giving any problems with this computer.
Kamryn PendragonRESEARCHERAsked:
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Rob KnightConsultantCommented:
Hi,

have you tried setting the Chrome Global zoom:

https://www.cnet.com/how-to/how-to-adjust-chromes-default-zoom-settings/
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Rob KnightConsultantCommented:
Here's how to set zoom level in the registry:

http://www.thewindowsclub.com/change-zoom-level-in-internet-explorer
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nobusCommented:
what os are you running?
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Kamryn PendragonRESEARCHERAuthor Commented:
I had checked earlier and determined that 100% is my default  zoom setting.
I would feel VERY uncomfortable doing anything concerning the registry. I have never touched the registry in this computer and prefer not to start delving into it for this problem.
I am using Windows 10. I will try to see if there are any upgrades available for this opsys now. Note: I have done a  cold boot after any of the changes I have tried.
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nobusCommented:
>>  I would feel VERY uncomfortable doing anything concerning the registry.   <<   there is no need; just be a bit cautious.
Here's how : before starting - backup the registry
you start it using the windos + R key, and type regedit -  allow to make changes
now select file -export to backup the registry, and save it on a place of your choice

now you can make changes - and return if anything goes wrong
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Kamryn PendragonRESEARCHERAuthor Commented:
Dear Experts, I apologize, but I don't think I am making my question clear enough. Virtually EVERY time I first open Chrome the "zoom level" is correct at 100% and all looks great. However, when clicking on many links the zoom level will change to 25% on the  clicked upon page. This is without me telling Chrome to change anything having to do with zoom. I simply have clicked upon a link. If I go back to the previous page, the previous page is the normal 100%. If I go forward the clicked upon page is still 25%. If I change that page to 100% zoom it does go to 100% but leaving it and returning immediately brings me back to the errant 25% level.

In the earlier version of this question an Expert gave me instructions on how to check the default Chrome zoom level. It was listed correctly at 100%.

Perhaps there is a way to UNinstall Chrome, reboot and reinstall Chrome? Would that be possible and also a good choice for me?

I do realize that working in the registry can be safe after making a backup, but I still will not make any changes in the registry. I have had bad experiences in the past working in the registry and will  not ever attempt it again, as safe as it may sound to others. It simply is just not an option  I would consider. I  would reinstall  Windows  10 before delving into the registry. However, I do appreciate your encouragement to try something that might have  lead to  success.
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Kamryn PendragonRESEARCHERAuthor Commented:
I just remembered that I attempted the same tests and links with Firefox and got the same results. At this point I think it would serve no purpose uninstalling then installing Chrome. It must be something else causing this problem. Very frustrating
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Kyle SantosQuality AssuranceCommented:
It really sounds like Windows 10 is doing something to override the browsers.  Let's check.
Go to Search Windows (the magnifying glass)
Search 'Magnifier settings'

Are Magnifier settings turned on?  Try turning them off and rerun your tests to see if the same thing happens.  Maybe even restart your computer just to be safe.

reference https://support.microsoft.com/en-us/help/11542/windows-use-magnifier

Added Windows 10 topic.
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Kyle SantosQuality AssuranceCommented:
Another test you could try is creating a new profile and logging into that profile then running your tests.  Does the issue reproduce?

Create a local user or administrator account in Windows 10
https://support.microsoft.com/en-us/help/4026923/windows-create-a-local-user-or-administrator-account-in-windows-10
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Kamryn PendragonRESEARCHERAuthor Commented:
ANOTHER BIG CLUE! I just returned to this computer to view the latest Expert hints & suggestions. I had been in the process of writing a letter using Microsoft Word. MOST of the screen appeared normal except for the actual representation of the piece of paper I was writing on. It was only about 1.5 inches tall and absolutely no way to read it. I did do a select on one  paragraph and then opened up Notepad and pasted it.  It showed the paper and the  large 20 point text I was using perfectly. But whatever black cloud that is following this laptop is also affecting Word also. It came as a shock to me.

At this point I will perform any suggestion that does not require me to reboot thinking that an Expert might want me to interrogate a particular setting when the laptop is in this particular state. I will post any results as soon as I am able to perform any suggestion. Thanks Experts for not giving up on me!
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Kamryn PendragonRESEARCHERAuthor Commented:
Note for Expert Kyle Santos I just checked Windows Magnifier settings. it is turned OFF. I did not touch it. I then clicked on your link. The link then came up at 25% magnification and was not readable. When backing up one page the EE page was normal. The clicking to your link and its display of 25% is repeatable.
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nobusCommented:
i had yesterday a weird printer problem; wifi printer did not print, was not appearing in printer section, word di not open, installing the software did not work, etc etc...
finally i ran sfc /scannow  and all of a sudden , the printer started to work, and ALL problems were solved
so thats my suggestion : run sf /scannow
right click the start button, select powershell as admin, and type sfc /scannow
it may take several minutes
then you can exit, or close the window
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Kamryn PendragonRESEARCHERAuthor Commented:
nobus - I ran the above test. It reported that it did not find any Windows integrity violations.
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nobusCommented:
and you still have the same problem ?
in my case it did not find anything either -  but everything worked
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Kyle SantosQuality AssuranceCommented:
Did you try creating a new Windows 10 profile and running the same test?
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Kamryn PendragonRESEARCHERAuthor Commented:
IMPORTANT NOTE FOR ALL EXPERTS: I am 95% sure that this problem has been solved! I do not have the time to explain the steps taken by an Nvidia technician but within 48 hours I will post an explanation of what solved the problem and close this question. Back as soon as I can...
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Kamryn PendragonRESEARCHERAuthor Commented:
SOLVED! Out of desperation I took a chance and phoned Nvidia to see if they could assist. The technician I spoke to connected to my computer and within a few minutes all was functioning fine. He was working very fast and I did not catch everything he did by any means. The last thing he did was go to  settings in Chrome and change if from 25% to 100%. It is something that I had  done many times in the last few days, but, for some reason, it worked for him. He could not or did not explain how a Chrome setting could affect a new letter in Word, but he made a similar change in Word and it fixed that Word problem also. it still could return, but for now all seems perfect. I am sorry that I cannot be more specific on his thought process, but feel  fortunate enough to have just gotten it fixed.

Thanks to the experts that helped me along  the way. You Experts are the BEST!
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nobusCommented:
tx for feedback
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