RTW Graphics Help!!!

[Darkvicer98]

In RTW, i've changed my graphics to after clicking the 'auto-detect best graphics button' then i changd the graphics to speed and did a few custom bits in that. But my graphics have gone like your watching a video of RTW on youtube. The Detail has gone,the roads,grass,walls,buildings etc. I could show you what i mean but i don't know how to take a picture of the game whilst in gameplay,I understand you use the print screen button then go into paint but what from there? Can anyone help?

Edit:If i uninstall RTW and reinstall it will it delete my saved games?