Hi my daughter has a similar problem, with her Toshiba laptop. Originally we thought the keyboard was locked but it now seems it's the Ctrl key which is locked, if we open up Internet Explorer & press T we get a new tab, etc etc.
Although I have not managed to solve the problem, I have managed a work around by using onscreen keyboard which can be found in accessories > Accessability & then clicking the Ctrl key on & off on the onscreen keyboard allows us to then use the laptop keyboard as normal, while this procedure has to be done each time we re start her laptop.
Alice Pink
May 2008