Two flaws have been discovered in Real Media’s Realplayer, they can be used to compromise the machine on which Realplayer is running. You can read more about it here and you can get updates for your Realplayer here.
On the Virus front, the new Bagle variant is running amok, it isn’t technically a Virus, but rather a Trojan horse (a progam that opens a back door on your PC that allows a remote party to take control) and as such has no self propagation method itself relying instead on an apparent spam out, read more here. The danger is not just the Trojan itself, but also that it can in some cases turn off your anti-virus protection making you susceptible to other infection. Here you can find the top ten Viruses from Sophos for February which makes for interesting reading. For anyone not sure they are protected we suggest you head over here, and pick up one of the free anti-virus programs listed there.