I have a Lenovo Legion Y545 and finally found a lock that works for it. I had 3 other Kensington locks and none of them worked, one of them was brand 'Lenovo', I called Lenovo Sales and they recommended the wrong one, that's crazy. Anyway it worked :)
π Ultimate Notebook Security: Kensington 64050 ComboSaver Lock and Cable for PC/Mac
10 Review
π Secure Your Desktop Computer and Peripherals with the Kensington K64615US Locking Kit
9 Review
Improve your iMac Security with the Kensington SafeDome Secure Lock (K64962US)
11 Review
Secure Your Laptop with the π Kensington K64638WW ClickSafe Keyed Twin Laptop Lock
12 Review