Hello, I have friend's computer. Her son got on it, I removed the viruses that it had, and wanted to set the 4730 back to factory settings after purchasing the disc set from Acer. It runs the 1st disc, and when it calls for the next disc, I put it in and after a few seconds says BOOTMGR IS missing. I explored all of their discs on another computer and BOOTMGR is on the 1st disc. When I go to DOS security it says that HDD is froze, and I can't change that. Any suggestions would be deeply appreciated.