We noticed back recently, that our typing words were being,changed letter by letter.Then past few days entire sentences are disaperaing.We cant any longer sent email messages even?.How to fix after severial scans and different scan engines that work together ,with AVG.

Log on to following website and do full scan and remove any threat that you find:for XP: http://onecare.live.com/site/en-us/default.htmFor Windows 7 and Vista: http://onecare.live.com/site/en-us/center/whatsnew.htmThen you might try Microsoft Security Essentials: http://www.microsoft.com/security_essentials/If you still have problem contact Malware support team: I think my computer is infected