The main issue of the problem is that i can't load Ubuntu 12.10 desktop - i386 after install near win7basic (windows 7 was preinstalled on my laptop). I've tried manual reconfiguring of file system, have tried automatic one. also tried to install ubuntu 12.04 - destop - amd64. None of errors were noticed during the installation process. But after install windows 7 starts automatically. seems to me that nothing changed within winloader. I know that not so much info i put in here, but i'll answer any questions.
Your problem is that you're attempting to mix BIOS-style and EFI-style booting. Windows 7 is installed in EFI mode, as indicated by the use of a GUID Partition Table (GPT) with an EFI System Partition (ESP) as
The cleanest solution is to wipe your current Ubuntu installation, download an AMD64 version, and install it in EFI mode. Unfortunately, the Ubuntu installer doesn't make it clear that you're running in EFI mode vs. BIOS mode. To make that determination, you should open a shell and look for the directory
Another solution is to install my rEFInd boot manager in Windows. Edit the
Yet another solution is to use your computer's own boot manager, which you typically access by pressing F2, F8, or some other function key during startup. You should have options to boot Windows in EFI mode or to boot from your hard disk in BIOS/legacy mode. (The exact names used vary from one installation to another.) This is likely to be the most awkward solution in the long run, but you might consider it acceptable, especially if your firmware has a better-than-average boot manager.
You didn't install Ubuntu bootloader to MBR.
To restore GRUB follow this link: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows
If restoring fails, see the first answer: How can I repair grub? (How to get Ubuntu back after installing Windows?)
If it still fails, try again but install GRUB to your Ubuntu partition: if it is in /dev/sda7 enter
to install, then use EasyBCD and add an entry for your Ubuntu partition.