There is no difference between PC and Laptop in terms of Internal hardware and software.
The Anti-Virus made for PC is able to run in laptop with same system protection
Best Anti-virus to PC means it is also best for laptop and vice versa.
I will Recommend you to install Bitdefender
in your system whether it is laptop or PC.
Bitdefender capable to make your system run faster and avoid from annoying notifications.
It gives fully automatic protection from auto Pilot mode and manual protection from user mode.
bitdefender is best in protection and performance, It has many features to make PC or laptop run faster, It consume only 100MB of RAM and maximum 3MB/s of Disk for background protection to give real time protection against viruses, spyware, malware and other latest viruses.
The better system protection and performance makes Bitdefneder #1 Anti-virus in the world.
The popular products of Bitdefender are
1. Bitdefender Sphere
2. Bitdefender Family Pack 2015
3. Bitdefender Total Security 2015
4. Bitdefender Windows 8 Security
5. Bitdefender Internet Security 2015
6. Bitdefender Antivirus Plus 2015
7. Bitdefender Antivirus for Mac.
You can choose any one of them for your system as per your requirement of protection.
In case of price all these are paid but provides 30day of trials per PC or Laptop.
In case of free virus protection with Bitdefender you can use cracks or Activation key to run for free.