Download the free version of malwarebytes from click here and then run the program in safe mode on your laptop. Any malware found should then be removed using the program. This method is more likely to find any malware than running the program in normal mode.
Do you have an anti-virus program installed, unless it is part of your Norton program? If not I suggest you download AVG free version from click here choose the correct version, either 32 or 64 bit and then check for updates. Run this program in normal mode to see if you infected by any viruses and if so quarantine them.