I am trying to find a free user manual download for my Toshiba NB205 - N310.

hi there.
if you go to this link and you do what it saying about over clocking then you do so at your own risk.
https://www.computerworld.com/article/2528214/computer-hardware/5-ways-to-overclock-a-netbook--really--.html
or this link.
How can make my netbook faster
or this.
Speed Up Your Netbook Toshiba NB205 Toshiba NB525 upgrade laptop boot time...

SEE BESIDE MUTE BUTTON ,I DONT KNOW WHETHER IT IS OR NOT BUT IN MY NETBOOK OF HP IT IS THERE.

Unplug the external dvd writer and don't plug it in untill after Windows boots.

Check if it works with an external monitor. If it does your laptop screen may have a problem. However, if it does not work with the external monitor attached, your laptop may have a motherboard issue.

I'm assuming you have all the drivers installed and properly configured.
Yes, it appears that a part doesn't start up as it should. Run this program 
http://www.cpuid.com/softwares/pc-wizard.html
and check the voltages, if one is low then the board is failing.

The manual on the support page should tell you, but unless you have done this kind of thing before I would not try.
I have built a few pc's and repaired many pc's and laptops. and i would not want to try that.

you probably need intel graphic media software go to Cnet this will help with the video/picture

• http://download.cnet.com/Intel-Graphics-Media-Accelerator-Driver/3000-2108_4-10300119.html

feel free to rate the help

Search for the display drivers for your computer

Is that particular message, is it referring to your web cam? If yes, download the driver from the support website of Toshiba and reinstall it on your computer. Here's the link. I searched it for you. http://cdgenp01.csd.toshiba.com/content/support/downloads/driver_camera_chicony_TC40025100G.exe Download the file, save it on your desktop then run it. Another solution is to reformat your hard disc or run system recovery.