i hve just bought two license key of f secure internet securty, can these two license key be merged into one single key
Do you mean that you want to extend the time of the first licence by adding on the second one? I know that you can add a new licence to a running subscription if you want to renew it, and the second license will run from the end date of the first one, so you don't lose any days by 'crossing over' the licenses. Not sure if you can add two licenses at the same time, say, at the start of a subscription term, but maybe F-Secure can clarify in the morning?
If that's not what you want to do, you'll need to Contact Support by Phone or Chat with anything to do with licenses, for privacy and security reasons.
As Simon has mentioned, it is possible to add a second license on top of a first license, by which the license period of the first gets merged with the second license. In the product FSIS, just add the first license and validate it. Once done, you can add the second license to extend the license period.