Laptop security
The easiest solution to laptop security is as follows:
1. Buy laptops with password protected BIOS.
2. Install O/S and software.
3. Disable CD ROM drive boot in BIOS (stops people installing a new O/S)
4. Give users permissions (technical term) only allowing use of specific software.
This way, even if they do steal the laptops, they will be of no use as the laptops can only be used for the software which has been designated and other software cannot be installed. A couple of laptops may be stolen, but people would soon learn.
There is a way around this, but it would take an engineer a few hours. Most pilots wouldn't know this is possible.
Hope that helps. Email me if you need more info.