2 questions

i have noticed on our network that a message appears telling the client that they have mayb 10 15 messages,when trying to log onto the net its not making the connection,i think its a mailing virus but would like to b sure,

question 2,,msnp32.dll is not loading in a client pc,where is the file contained on the pc,and will simply pasteing a new msnp32.dll fix this.
tanks for support