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I first installed Windows 7 ultimate onto my machine and using Windows 7 built-in partitioning system, I partitioned my disk into many smaller disks of NTFS file systems. I then tried to install Ubuntu 12.04 onto my machine.
I installed Ubuntu and Windows 7 side by side because I needed both operating systems but while booting I was getting an error:
Attention out of range H:92.6KHz V:58.2Hz
I was not getting any dual boot menu - no message was seen except the above message. I tried pressing the down arrow to move between meu items, thinking that the menu might be there just not shown. The first time it directly logged into Ubuntu then next time Windows 7.
When I logged into Windows 7, I deleted the volume in which Ubuntu was installed. Now, I am getting this error:
error:unknown file system grub rescue>
I want Windows 7 back and a better way to install both operating systems. Please give me some help in this regards.