I have a Compaq Presario and I have not been able to use it for quite some time. I have reformatted the drive serveral times and it will work for a max of a day and then when i try to start it up it will give me the message of operating system not found. I have tried to make a boot up disk since it seems the system is trying to check the A drive on start up but i'm not sure if i am just not making it right or if that is not the problem. I am running windows xp on the system and have tried basically everything. Any help would be great. Thanks