Chance are that your sendto folder is corrupted. (You can use shell:sendto in Run to locate)
If that is the case, you can fix it using Advanced System Care.
Check the page http://www.iobit.com/help/asc/doc/toolbox.html. Search for IE Helper. IE Helper will help you restore your default context menu.
Caution : Since the OS language is not English, there is a risk that ASC will tamper with your registries regarding contect menu incorrectly.