can't even begin to install ubuntu

i downloaded ubuntu and made it in the usb version thing.
have my laptop (toshiba satalite l355-s7902 with default spec) boot from USB.
get to some kind of ubuntu screen that give me the obtion to boot from USB, or install, test memory, boot from first hard disk, advnace option, help.

i tried both boot from USB, and install and get the same kind of error.... well all those choices produce the same error

the screen turn black and went throught god know how many lines of words ...
got so flash.... all i got are these lines :

begin: preconfiguring networking... ... /scripts/casper-bottom/23networking: line 31: can't create /root/etc/network/interfaces/ nonexistence directory
cp: can't create '/root/var/log/': Is a directory done.
mount: mounting/sys on roo/sys failed: no such file or directory
mount: mounting/proc on / root/proc/proc failed: no such file or directory
Target filesystem doesn't have requested /sbin/init
no init found. Try passing init= bootarg.
BusyBox v1.17.1(ubuntu 1:1.17-10ubuntu) built-in shell (ash)
Enter 'help' for a list of built in commands.

(initramfs) "<<<"i can type stuff in here, assuming for the commands stuff">>>

and please help me to dual boot ubuntu with my machine with windows 7 installed

 

How did you create the USB installer? It looks like there could be a problem there. Maybe try unetbootin: http://unetbootin.sourceforge.net/

 

I have rarely had issues with installing Linux, but when I have I found simply downloading a different version, or the same version again, to solve the issue... but you do have to make sure you have a regular disc image (not one labeled "Alternative install disc"), and that it will work for your processor (for a X86 machine [ie:32 bit only] use the i386/ 32-bit Version, if you have a X64 processor and want to run 64bit because you have enough ram then use the amd64/ 64-bit version)

There are of course other distros of Linux that are as good as or better than Ubuntu (its all personal preference), but the most notable of which is Linux Mint

 

Which version? Try 10.04. I had problems trying to install anything after that on my Toshiba T235D due to a lot of bugs in Toshiba Bioses AND the removal of a bunch of workarounds in later kernels.

 

It could be one of these possibilities:

1. Your RAM module(s) are bad
2. The ISO file you downloaded is probably corrupt. Check the SHA1/MD5 after downloading just to confirm.
3. The tool you used to make it a bootable USB and copy the Ubuntu setup files, didnt do a proper job - unetbootin is a widely used tool and has a high success rate - use this one if you used some other tool earlier or try with the latest version of unetbooting and the latest version of Ubuntu ISO.

 

I have had corrupt iso's, even when downloading on my nice fast home connection. Definitely re-download the iso

 

downloading via torrents is more reliable and often quicker, especially where the oddball distros are concerned

 

i had similar issues with my Asus and found out after a little while trying different Distros and Windows again that my Ram was bad replaced and viola all working great.....

 

re: corrupt image/iso
iso downloads usually get get listed with an md5 hash or the equivalent to let you verify integrity. Verify them all the time to avoid headaches. Torrenting typically does this automatically. If you already downloaded the iso, grab the .torrent file and try to seed - the file will be checked against the checksum for integrity. If you can seed, then you can knock out corruption as a suspect.