What you’re seeing
- Photos and images in File Explorer show a plain file icon instead of a preview.
- Thumbnails work in some folders but not in one particular folder.
- Images on a mapped drive or network share never show previews, while local pictures do.
- Certain formats, such as iPhone HEIC photos or camera RAW files, show icons while JPEGs preview normally.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- Explorer is configured to always show icons instead of thumbnails, either by a user preference or a performance setting.
- The thumbnail cache is corrupt, so Windows can't redraw previews it generated earlier.
- A Group Policy setting turns off thumbnails on network folders to reduce traffic, which affects mapped drives and shares.
- The image format needs a codec or extension that isn't installed on the PC.
- The folder's view template was switched to one designed for documents or general items.
Why it matters
For businesses that work with photos, such as real estate, construction, insurance, marketing or retail, thumbnails are how staff find the right image. Without them, people open files one by one, slowing down routine tasks like assembling reports, listings or claims. It's rarely a security issue, but the lost minutes add up across a team, and the same root cause, such as a damaged cache or missing codec, can also affect previews in other apps.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Have our photos been damaged?
No. Missing thumbnails only affect how Explorer displays the files; the images themselves are intact and open normally.
Why do pictures on the shared drive show icons when local ones are fine?
Thumbnails on network locations are often switched off by policy or limited by the connection. An engineer can confirm which applies to you and whether it's safe to change.