Hello wise and most helpful people knowledgable in the the art of computers, These are my problems, the first one started with the monitor going off about fifteen twenty mins into game play, by going off i mean the computer crashing the light on the monitor flicks as to indicate no signal in some cases i hear sound for a time , but i have to turn the computer off and on to recover it, and the other problems im now incountering weather there caused by my own f\\\\ing around to solve problems but after installing two differant games the other day which highlighted the first problem, today on trying to play the first game it would bring up the first little option screen where i would choose play and the screen flicks black for a milli sec but nothing the same again, ok now im peed off so try the next game and it can not find the file. so i uninstall so i can reinstall in case ive damaged them whilst messin on the other day but having done that it wont play nothing nadder, i have only really had problems with my system when it has come to gaming althou not in a while. also could anyone tell me if i can totally restart or reboot or reinstall windows i dont care about losing anything i just want to get rid of these problems , plus somebody mention it could be lack of memory , so i have used the msconfig to go into selective start up and turn off most of my programs that have been running in the background. but i would really appreciate some advice on how memory works in that respect i know i have a huge hard drive but what other memory is the computer using and how might i be using this in the wrong way. please help im so desp erate