malware ? nope i try and test all stuff that i upload to internet plus if posible i use original source.
If you do not unmark options it will install you Yandex toolbar but do not worry that search toolbar do not have spyware or malware. (well all search toolbars include google ones will use your personal information and all stuff that you search on internet to make profiles with hidden & evil pourposes) in fact almost all free programs use your personal information