Having Problems Formatting Acer Aspire Pc

i have got a acer aspire desktop pc and need to format it back to factory settings i have tried the alt f10 and it just comes up with a black screen saying

Edit boot options
path windows system32 winloader exe

partition 1
hardisk 188b504

[/no execute=option

i dont have e recovery on my pc and have no disks please can anyone help

M1641 is the model number