Hi
I really dont understand the problem here to this email? She is basically asking for another onsite? Am i wrong?
I would have replied back with
Hi Customer Name
This could be a virus, We can repair this for you.
Would you like me to call around to repair this for you. The cost of the repair would be from $.... to $....
If you wish to book a time with us please let us know via email or call us.
Look forward to hearing from you.
Thank you.
that is all that is needed for this customer? Or am i missing something?