ok, sit up straight cause this is going to take a while.
i used WUBI to put Ubuntu on an SD card. i ran it off that for a while, and keeping my Vista. then i tried upgrading to to 10.10. there was even a special installer for GRUB in the process.
that's when the problem started. after my comp finished the upgrade, it restarted. but this time, in grub rescue. i tried some of the codes in the wiki, but everything came up unknown command. then someone in the chat told me to use a Live CD and a Super GRUB2 cd.
the LiveCD booted to a screen with a picture of a "keyboard=person with a circle around it". then after a few minutes of just that, lines of text reading:
EDD: error 8000 reading sector 3567the Super GRUB2 cd let me get the OS list i usually get from starting up. only Vista would start up without problem. Ubuntu had.. a problem i cant recall right now.
EDD: error 8000 reading sector 3577
(and more with consecutive numbers)
i redid the Live CD, and im back in Ubuntu. i tried the ways of reinstalling GRUB2, as advised by the chats, but nothing seemed to work as described in the reinstallation section of this.
and that is where i stand right now. also, my SD drive's light doesnt turn off now, even when there is no card in it. im kind of worried that when GRUB installed at the 10.10 upgrade, it made that a partisan.