I am running Windows 7 Professional on a desktop tower; Processor is Intel Pent. (R) 4, CPU 2.40, Installed Memory = 2.00 GB. i can't boot, get error saying "Can't find Bootmgr", "Press Ctrl,Alt,Del to restart". So I do, then it wants a OS disk which I do not have. I had made a repair disc at one time, so i insert that, restart and it will boot after a while. How can I fix this bootmgr problem? I do not have the OS disc because I got this system from a friend who moved away.