Can I retreve my data if I have been hit by a Trojan Horse virus?
The thing about hard drives is that when a file is deleted it is still there until it is overwritten (this is why you should be careful when disposing of harddrives) If you take it to a computer specialist they can often recover most of the files for you, but it will cost a lot, and there are no promises that they can get it all or even any of it. So if you decide that the info you lost is very important then go for it, otherwise it may not be worth the cost. The other thing you could try is doing a system restore, if you have a restore point before the virus hit. This may work but I wouldn’t hold much hope to be honest. I would suggest getting some good anti-virus www.eset.com is really good, and has a free 30 day trial.