If you download LW from the official site Lime Wire » Official Website & Free Download « it'll be clean. No malware

Here are some good, free AV programs. Plus some other useful programs (also free). Grandpa uses Vista & he recommends Avast!, I have XP & use Antivir. AVG Free is also very good.

Anti-virus
avast!

AVG free

Avira Antivir


Antispyware etc
Spybot S & D (free)

AVG Antispyware (formerly Ewido)

Ad-Aware SE Personal (free)


IP blocker
PeerGuardian 2


Don't disable your firewall while using LW, just configure the firewall to allow LW You might also find that there's a firewall within your modem/router & this will have to be configured too. Check the Connection Problems section stickies for more info about this.