"I recently bought a second laptop for home, even though it was common at the company I work for to use your computer for work and pleasure." Another option is

"I recently bought a second laptop for home, even though it was common at the company I work for to use your computer for work and pleasure." Another option is to make your work laptop dual boot - either with the internal drive (partition) or with a portable external drive. If you have to return the laptop (with the internal drive partitioned) you can wipe that partition. Not necessary with the external drive option. For a practical matter (even under california employment law) they aren't going to know that you are doing this.