Why am I not able to open or view certain email attachments?

1. Check your system's antivirus software to ensure they have up-to-date virus definitions.
2. Verify the file extension; certain types of files can only be opened with specific software.
3. Ensure you have the necessary software programs installed on your computer to open the attachment.
4. Update the software program that matches the file extension.
5. Check the file size against the size limit that your email program can accept.
6. Search the internet for online versions of the software.