1. Insert my installation disk (Win 7 CD/DVD), boot from the disk, went to command prompt
2. Type following commands:
bootrec /fixmbr
bootrec /fixboot
bootrec /rbuildbcd
exit
3. Then click on 1st option (something like 'Fix startup')
4. Then after a while asked for restart, pressed 'Finish' and then reboot.
That works fine now, though my grub loader been away and I need to fix that now.