The " and @ keys on my Dell laptop have mysteriously switched functions. They continue to work as before for the number 2 and single quotation mark, but the double quotation mark and @ functions have been switched. Also, the hash key, though still a functioning number 3, gives me a £ sign instead of a hash sign. I suspect it's a hardware problem, but I can't be sure of this. Any help would be much appreciated. Thanks in advance.