Did you encounter the same issue using this file?
http://specs.buho.ch/Printer_Scanner/WinS1500ManagerV55L10WW.exe

When I tested it, I still had to manually apply the drivers after installation. To help, I created a file:
s1500-x64.inf_amd64_ff718616e5120c3b.zip

You can download it from my Google Drive:
https://drive.google.com/file/d/1SPFxk1v9_JEGY73u6zLN3mvP7hOy7Dhp/view?usp=sharing

After installing the main application, try going into Device Manager to add the driver manually.

When I click on the above url, I’m redirected to: https://www.pfu.ricoh.com/global/scanners/scansnap/dl/index.html

Seems that Ricoh doesn’t want people gaining access to the software/drivers for the no longer supported s1500.

Am I doing something incorrect?

Hai riscontrato lo stesso problema utilizzando questo file?
http://specs.buho.ch/Printer_Scanner/WinS1500ManagerV55L10WW.exe

Quando l’ho provato, dovevo ancora applicare manualmente i driver dopo l’installazione. Per aiutare, ho creato un file:
s1500-x64.inf_amd64_ff718616e5120c3b.zip

Puoi scaricarlo dal mio Google Drive:
https://drive.google.com/file/d/1SPFxk1v9_JEGY73u6zLN3mvP7hOy7Dhp/view?usp=sharing

Dopo aver installato l’applicazione principale, prova ad accedere a Gestione dispositivi per aggiungere manualmente il driver

1. Press Win + X or right-click the Start button.
2. Select Device Manager from the menu.
3. Locate the unknown device (likely from the scanner) in the list, usually marked with a yellow exclamation point.
4. Double-click the unknown device to open its Properties window.
5. Go to the Driver tab and click Update Driver.
6. Choose Browse my computer for drivers.
7. Click Browse and navigate to the folder where you extracted the driver files.
8. Select the correct driver file (it’s usually clear which one to pick, often an .inf file).
9. Complete the installation and check that the device is recognized in Device Manager.

I am running windows 11. I downloaded the Wins1500Manager V55L10WW.exe file and loaded the ScanSnap Manager App. ScanSnap Manager is an App on my PC that looks like I can open and run, but when I click on it to open it nothing happens? I also downloaded the zip file with the driver (4 files) from your google drive but don’t have any idea what to do with those files, nor how to get the ScanSnap Manager to open.

Can you provide some layman steps for how to get this app running as I am not very computer savvy

Did you encounter the same issue using this file?
http://specs.buho.ch/Printer_Scanner/WinS1500ManagerV55L10WW.exe

When I tested it, I still had to manually apply the drivers after installation. To help, I created a file:
s1500-x64.inf_amd64_ff718616e5120c3b.zip

You can download it from my Google Drive:
https://drive.google.com/file/d/1SPFxk1v9_JEGY73u6zLN3mvP7hOy7Dhp/view?usp=sharing

After installing the main application, try going into Device Manager to add the driver manually.

Glad you found a copy online I’ve also downloaded it i’m thinking of placing it on the Internet Archive, trying to figure out if thats allowed or not.

I was able to find the offline instalar by googling the filename you shared.

http://specs.buho.ch/Printer_Scanner/WinS1500ManagerV55L10WW.exe
I don´t know how long it will stays here, but it may help while you upload your copy.