Cannot open jpeg, jpg or some other extensions such as exe files from thumb drive.

[ferrarr]

6 or 7 years ago I put a load of pictures on a thumb drive. At that time, the thumb drive was used on a Windows computer. All files were scanned by updated McAfee. I have since switched to MAC, glad I did. Some files will open, most will not.

Does anyone know anything I can try to recover them ?

Just as an FYI, Macs can read from: NTFS formatted drives, can read and write to ExFAT, FAT formatted drives. You "might" be able to copy the files to your Macs drive, and open them from there, except for the .exe files as has already been stated.