Windows 10 slow after manually updating to Creators Update

philc43 said:

This test is actually a test of the searching ability in File Explorer and will depend on the indexing that you have set up and also whether or not you have previously indexed the image files.

In my test the Windows directory found 4275 items in about 10 seconds. When scrolling all the icons show up with only a very short 1sec lag.

No, I actually meant not the search speed, but once search finishes. It's just a way for everyone to reproduce the problem, even the people who don't have folders with many images on their computers. Windows has a lot of image bloatware, so I used that as a tool to reproduce the issue.

Basically, if you run the search, and wait for it to finish, and THEN scroll, you will see that scrolling lags and thumbnail generation lags behind. Now that would make sense if that was happening only for the first time, since windows is still generating thumbnails for the new images.

But you will notice that it does not happen only first time. If you scroll through the entire image list, let the thumbnails generate, then close the window, run the search again, wait for it to finish again, and scroll again, you will see it lags even on subsequent attempts.

I am 99% confident Creators Update has introduced some bug with thumbnail caching.

Aaaaaaaaaand it's solved!

Of course, it's Microsoft's shitty "Photos" modern app, which has probably some callback occurring every time thumbnail gets cached, resulting in super slow caching of them.

If you right click, and set default program to open jpg, png, and other image files to be old Windows photo viewer, everything goes quick.

So it's a performance regression caused by some update in Photos modern app in Creators Update.

FWIW, after I updated to 250 I deleted all thumbnails with Disk Cleanup and restarted. It *appears* that this may have helped. Also reset my color space as rawalanche suggested. Will spend the day with it and see if things are better.

I tried to delete thumbnail cache via the cleanup too, didn't help. Color profile may help a little, but what definitely helped to me was setting default app for image file formats to be old Windows Photo Viewer instead of the modern Photos app. That reverts the performance back to pre-Creators Update state.

It also makes sense, because thumbnail generation is always responsibility of the app chosen as default for given file format.

rawalanche said:

Aaaaaaaaaand it's solved!
Of course, it's Microsoft's shitty "Photos" modern app, which has probably some callback occurring every time thumbnail gets cached, resulting in super slow caching of them.

If you right click, and set default program to open jpg, png, and other image files to be old Windows photo viewer, everything goes quick.
So it's a performance regression caused by some update in Photos modern app in Creators Update.

I don't that the problem is solved, because I seriously doubt that thumbnail caching is in any way connected to Microsoft Photo app. Changing defaults do not improve the performance.

I did the *.png test and it works very smoothly there. I tried changing the size of icon preview and I ran the test few times. Everything smooth there.

My windows version is 15063.138. I will try to update to .205 and see what happens.

Nexus6p said:

I don't that the problem is solved, because I seriously doubt that thumbnail caching is in any way connected to Microsoft Photo app. Changing defaults do not improve the performance.

I did the *.png test and it works very smoothly there. I tried changing the size of icon preview and I ran the test few times. Everything smooth there.

My windows version is 15063.138. I will try to update to .205 and see what happens.

I am really sorry it does not work you. It definitely works for me. I've even made a video to show you I am not kidding, here: Windows 10 Creators Update slow explorer thumbnail loading fix - YouTube

It really makes a big difference in my case.

I am also running latest cumulative update, which I've updated to yesterday, and that itself did not fix anything for me, so I doubt it will fix anything for you.

You should really try to change default app for your image files if you haven't yet :)

dalchina said:

If you're not using Photos, you may want to make sure you have no albums configured.

Not sure what exactly you mean? Albums somehow decrease Photos' performance, or...?