NOPE, not really. D whole idea of d multi-user profile is 'isolate' 1 user's preference/setting/customization of Windows & it's docuements /data files from 1 & another.

As such, using d multi-user profile feature provides onli very, very slight or NO extra protection from viruses/malwares etc. as all users still shares d same installation of Windows. So if dat installation of Windows get infected bcoz of 1 user, d other users would be 'pulled-in' as well. However, data files & specific user installed apps maybe 'temporarily' spare das they r encrypted (provided u r using user password & NTFS) BUT it's a matter of time, sooner / later it may likely 2 get infected by EXE & macro based viruses which infect those types of files.