Use the link above to download the file dicom-thumbnailer-setup.exe. It's a good experience to check the file for malware. So, use your antivirus program or try a free one – Avira Free Antivirus. Run the file after getting 5.8 MB and follow the setup instructions.
You can uninstall DICOM Thumbnailer without any problems. Click Start and then Control Panel. Choose the program you need to remove and press Uninstall.