The Download.com Installer securely delivers software from Download.com's servers to your computer. During this process, the Download.com Installer may offer other free applications provided by our partners. All offers are optional: You are not required to install any additional applications to receive the software you selected.
From Security Stronghold:
SweetIM Removal Tool is automatic program that will help you to get rid of all instances of SweetIM software. It scans registry and hard disk to find keys, files, folders belonging to SweetIM. It allows to remove all found items just in one click. In some cases you need to reset your browser settings after Sweetim removal. Software have full 24/7 support.