extra large icons stopped working

Hi, forgive the obvious question:
- do you have a system restore point prior to this occurring?
- or a disk image which you can use to restore your system to a previous state? (We strongly recommend the routine use of disk imaging e.g. Macrium Reflect (free) )

Is this problem apparent only in this one folder?

Please compare this
a. in Safe Mode
b. after a clean boot
c. when logged in as another user (create one for test purposes).

a & b may help to eliminate 3rd party conflicts (but not context menu extensions)
c may help to identify a user profile corruption issue.

Finally, do you know of any changes you have made in the last 3 days?

Hi, as you have a number of problems not related to your user account and present in safe mode, I would suggest you do an in-place upgrade repair install. Here's my write-up on it.. do make sure you start using disk imaging - that's how you can recover should something go wrong during this procedure. This will take you some time to prepare for; there are several steps.

You may like to find a friend who's familiar with PCs as this, while routine to many people, will seem a lot to take on first time.

Precede it with this in case sthg has happened to your file system:

From an admin command prompt
[Windows key + X, click command prompt (admin)]
chkdsk C: /F
Your PC will need to restart.
Make sure the result is clear or fixed- else do not proceed.
Post back the result, which you can get after a restart as follows:
How do I see the results of a CHKDSK that ran on boot? - Ask Leo!

An In-place upgrade repair install will fix many things, but not those where the settings are not changed by the procedure.

For this you need an installation medium with the same base build as you have installed, and x64 if you have a 64 bits OS, else x86 (32 bits).

Recommendation:
Before you perform the following major repair procedure, do create a disk image (see below).

Repair Install Windows 10 with an In-place Upgrade - Windows 10 Tutorials
- this includes a link from which you can obtain Windows 10 iso file (" download a Windows 10 ISO"), or create a bootable medium.

I would recommend creating the bootable medium, as this can be used
- for any future in-place upgrade repair install
- to boot from and use its recovery options should Windows become unbootable.
- to clean install Windows

This will refresh Windows, after the manner of a Windows installation.
- all/most associations will be unchanged
- all your programs will be left installed
- no personal data should be affected
- you will lose any custom fonts
- you will lose any customised system icons
- you may need to re-establish your Wi-Fi connection
- you will need to redo Windows updates subsequent to the build you have used for the repair install
- Windows.old will be created
- system restore will be turned off- you should turn it on again and I recommend you manually schedule a daily restore point.
- you will need to redo any language downloads including the display language if you changed that)
- inactive title bar colouring (if used) will be reset to default
- if Qttabbar is installed, you need to re-enable it in explorer (Options, check Qttabbar)
This is one of the better features of Win10: as each major build comes out, that's your updated reference build, and as updates are mostly cumulative, there will be few to do.


Please consider using disk imaging regularly. It's a brilliant way to
- preserve your system (and your sanity)
- back up your data
- restore your system to a previously working state in a relatively short time

Recommended: Macrium Reflect (free/commercial) + boot disk/device + large enough external storage medium.