virus removed!

My AVG anti-virus program removed 25 instances of this Malware on My PC. I have no idea how it happened to find its way here since I don't do much browsing and I'm very careful with emails. Now its been quarantined and I haven't observed and more problems.
 Been a busy weekend so no time for radio pursuits. I hope to participate in next weekends VHF contest.
73----Tim