I don't think the "Aniv Rescue Disk" is appropriate in this case. Rescue disks are designed more for difficult embedded malware. Those that resist removal while the existing OS is running. Also, browser and search hijacks are not always detected or removed by traditional AV software. Nor are they necessarily removed by using System Restore. See if this YouTube video helps
Remove Uninstall sweetIM completely from all browsers.
In any case, I know about SweetPacks personally. Just recently downloaded a freeware utility from a well known tech site. Despite indicating that I did not want any add-ons during the install, quite common with freeware, it installed SweetPacks anyway. But in my case, it just took a few clicks to remove.
You may want to try using the freeware
Comodo Programs Manager(CPM) in the future. One of it's features is an Active Monitor which tracks all setup installs, updates, and changes to your system from a particular program. Uninstalling from CPM removes the core program and all linked programs, removing both files and registry changes. It can run automatically to detect setups, or you can right-click on a program you want to install, and it will monitor its installation. Designed for Windows, but does not support WIN 8.