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yesterday there was a power failure at my house and when i turn on my desktop, i had problems with user permissions on linux. I restarted linux and then, while booting, it gave me that error described on the title.

I've looked for some tutorials in order to fix this problem, but none of them could work. I'll show you some prints about information that could be important to know:

http://prntscr.com/2yqxz9 http://prntscr.com/2yqys6

I have some troubles about booting through USB or CD because my BIOS Setup doesn't have an option to boot via USB and i don't have access to my boot manager now and my CD-ROM driver is not working properly. At this moment, i only have access to BIOS setup and grub rescue.

I prefer to fix this problem through line commands but if it's not possible, i will try to recover my CD driver or boot manager, anyone knows how can i fix this?

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