On topic as I'm going to try & fix this myself!
For some reason every time I try to open a picture (jpeg) I get an error message "Class not registered" and it won't open.
Bill Gates has suddenly decide to do this, everything has worked perfectly before.
Found the following 'solution' online;
"Press Windows key + X, click Command Prompt (Admin). In the Command Prompt, type the following command, and then press Enter: sfc /scannow"
No issues found.
Any ideas?