I have an Acer desk top that came with no manual also.
If you need to know what's inside the machine you could download from:
click here which will tell you all there is to know about your machine.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
How VR is being used to simulate space
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.