ian_62 :
hi iv got a 500Gb external hard drive i used about 300Gb thus far, recently my folder disappeard as if they are hidden, but my drive show that 300Gb are in use. could it be a virus? and if so is there a good removal tool since i cant afford to lose my info. im using Xp
Your files may be hidden or deleted by the virus. I'll also suggest first of all try some powerful anti-virus programs to clean the virus. If the files are hidden, it will become visible again(meanwhile check your visibility settings). If the files are deleted by the virus, you can rely on some
file recovery programs to recover the deleted files. You may learn more from this article,
http://filerecoveryhelp.wordpress.com/2010/09/13/how-to-recover-lost-files-due-to-virus-attack/
it talks about how to recover lost files due to Virus Attack.