if we spend more than 4 direct hours on a computer we talk to the client about Reloading the OS with a full backup(if they need it)
Reload is $100.00
Backup is a separate charge of $50.00
We used to include it in the $100.00 but a thorough backup can be quite time consuming, especially if you restore it to the original locations on the fresh install. Also, we scan and clean the backup before we putting it on the fresh reload, which also takes time.
And on top of that we sell them MalwareBytes Pro. We haven't had anyone say no yet.