hi hope this helps
if on windows xp click start your see the run box type prefetch when that folder opens hold down the ctrl and (a) botton then delete whats in the folder,your pc might run a bit better,
on vista click start your see start search type in that box prefetch then press enter when the folder opens delete whats inside it
click start then click my computor then right click on local drive then click properties then click disk clean
if thay dont work do a full antivirus scan in safe mode limewire is full of crap i never use that i us bitlord
malware or spyware problems down load spybot and if you can down load windows defender from microsoft
i put this on a thread befor hope this helps
http://siri.urz.free.fr/Fix/SmitfraudFix.exe
This tool removes Desktop Hijack malware: AdwarePunisher, AdwareSheriff, AlphaCleaner, Antispyware Soldier, AntiVermeans, AntiVermins, AntiVerminser, AntiVirGear, AntivirusGolden, AVGold, Awola, BraveSentry, IE Defender, MalwareCrush, MalwareWipe, MalwareWiped, MalwaresWipeds, MalwareWipePro, MalwareWiper, PestCapture, PestTrap, PSGuard, quicknavigate.com, Registry Cleaner, Security iGuard, Smitfraud, SpyAxe, SpyCrush, SpyDown, SpyFalcon, SpyGuard, SpyHeal, SpyHeals, SpyLocked, SpyMarshal, SpySheriff, SpySoldier, Spyware Vanisher, Spyware Soft Stop, SpywareLocked, SpywareQuake, SpywareKnight, SpywareRemover, SpywareSheriff, SpywareStrike, Startsearches.net, TitanShield Antispyware, Trust Cleaner, UpdateSearches.com, Virtual Maid, Virus Heat, Virus Protect, Virus Protect Pro, VirusBlast, VirusBurst, VirusRay, Win32.puper, WinHound, Brain Codec, ChristmasPorn, DirectAccess, DirectVideo, EliteCodec, eMedia Codec, EZVideo, FreeVideo, Gold Codec, HQ Codec, iCodecPack, IECodec, iMediaCodec, Image ActiveX Object, Image Add-on, IntCodec, iVideoCodec, JPEG Encoder, Key Generator, Media-Codec, MediaCodec, MMediaCodec, MovieCommander, MPCODEC, My Pass Generator, NetProject, Online Image Add-on, Online Video Add-on, PCODEC, Perfect Codec, PowerCodec, PornPass Manager, PornMag Pass, PrivateVideo, QualityCodec, Silver Codec, SearchPorn, SiteEntry, SiteTicket, SoftCodec, strCodec, Super Codec, TrueCodec, VideoAccess, VideoBox, VidCodecs, Video Access ActiveX Object, Video ActiveX Object, Video Add-on, VideoCompressionCodec, VideoKeyCodec, VideosCodec, WinAntiSpyPro, WinMediaCodec, X Password Generator, X Password Manager, ZipCodec...
Most "All-Purpose" malware apps such as AVG, Norton, Spybot etc unforturnatly can not remove this vile pest called Smitfraud.
Good luck