Replacement in kind. Laptops get lost and damaged. Moreover, when you send a laptop off to a central repair facility, you may not even get the same machine back. Secure the right to give the lessor a laptop of the same make and a comparable model with a similar configuration, without being tied down to the same serial number. If you don't have this right, you may wind up eating an expensive loss.
All laptops come with the operating system and desktop applications preloaded by the manufacturer.
If the lease cost includes the software, make sure you have the right to use it beyond the end of the lease. Cleaning the hard drive. You may place additional software on the laptop's hard drive and thus leave a lot of your firm's information there. Get a warranty from the lessor that it will clean the hard drive when you return the equipment. You should perform this function yourself, but logistics sometimes make it difficult.