I have recently connected a 2nd HDD and loaded Linux on it. After loading linux on it I faced a problem. The problem is that this particular HDD is too be used on more than 1 computer. But what happens is that when it is disconnected I cannot load windows also. But on reconnecting it I can load any one. I get an error " GRUB boot loader error " ! What I feel is the problem is that since I loaded linux after I loaded windows the MBR file got rewritten and now for that reason I need to have the 2nd hdd connected, to it even to start my computer and work in the windows environment. I know this may sound a bit confusing but what I want to say is that when the 2nd HDD is connected I can choose which OS I want to load. BUT with the HDD disconnected I cannot work on the computer at all. The error I get is LIKE the 'BSOD' ( blue screen of death) but its not a blue screen. Can somebody please help me. What I feel the 2 solutions are Either I load windows after I load the Linux OS Somebody please tell me how to instruct the comp to load windows by default without my intervention. Thanks for the patience and the solution.