I always use an anti-static band when working on the inside of a computer.

I am insured (see under "ABOUT / BUSINESS INFORMATION")

I do a backup of your files if your computer is to be reinstalled, and follow a checklist to make sure that I do not forget something important. Among other things - I ask the customer what they class as important when backing up files etc.

I treat all information with confidentiality and am happy to provide a confidentiality agreement if you would so like.