i had a windows 7 professional on my computer. i tried dual booting it with ubuntu.while installing ubuntu when it asks which partiton you want to install it "as it said your all data in the partition would be erased but not before you confirm" so i selected go back and aborted installation because i didn't wanted that.....and bang i start my system again an i get this error "no boot device found".....i ran my hard disk test it say's PASSED so i dnt think my hard disk is corrupted..

i tried using windows 7 recovery disc but i guess it doesn't even detects a operating system on my laptop....

plz someone help i got no back up of my data...plz suggest some way to get back my data if i cant get windows back!!!

First, don't do anything that would write to the disk until you make a plan.

If the data is very important, then consider cloning the disk before proceeeding. Otherwise, you need to run from a live CD or install the disk in another computer.

Things to try:

Boot from the Windows CD, go to recovery mode and enter "fixmbr" (At least this is the traditional Windows drill---Win 7 will have something equivalent.)

Boot from a Linux "live CD" (Your Ubuntu disk is probably one), open a terminal and run "fdisk -l". ("sudo fdisk -l" on Ubuntu)

The standard data recovery tools are photorec and testdisk. http://www.cgsecurity.org/
These may be available on some live CDs (eg Knoppix)

first of fall thanks for replying, i was desperately waiting for help!!!

alryt what i thought of is putting my hard drive in an enclosure and retrieving data on another system. i hope the data is still there and it is just the operating system which has messed up !!!

then i would try booting from a windiws 7 cd as u said...i aborted installation of ubuntu so i dnt think i will be having anything of that on my system.

for the windows can you explain how to go in the recovery mode?? i dont want it to start installing windows all over again on my computer.

right now i am waiting for my hard drive enclosure shipping to arrive.......

Trying to recover the data first is the best plan.

As for Windows recovery mode, I seem to recall that it is an option when you boot the Windows CD. (I have not done it in a long time and then only with Windows 2000.)
"fixmbr" (or whatever it is now called) will only restore the MBR boot code.

If you can rewrite the MBR with any utility found on many discs like UBCD or disk wizard or countless others then it will make your windoze 7 bootable again...then you can start again with Ubuntu...

Summary:find a disc with a utility that offers to rewrite the MBR ...take your time and think about things,there is no need to be in a big rush,patience and persistence will reward you with a big smile...

so just find sonething that will write your MBR and do it.

okey....so i found this on the net

http://www.sysint.no/nedlasting/mbrfix.htm

this is some mbr fix and its uses the fixmbr command to fix it but iam not sure how do i use this software . I mean how do i run this on my hard drive.can anyone please take a look at it and explain.

well i found something on microsoft

http://support.microsoft.com/kb/927392

i tried using bootrec/nt60 C:/mbr

but that doesnt help as it says could not map drive C i also tried ALL command instead of C: but that doesnt help too.

then i tried Bootrec.exe/ScanOs to see where windows installtion is and to my it comes up with this

Total identified Windows installation:0

dose that my whole windows 7 is gone?

^
The answer to the boldfaced text is called Startup Repair. That's how to fix the MBR in Vista and Windows 7.

However, if you downloaded Ubuntu the standard way, you would get the Live CD. You can then try and mount the first hard drive from there. If you cannot access the drive, your partition table (aka MBR) is probably corrupted, and you have to start from scratch.

If you think the partiton table is broken you can repair it with a utility called Test Disk found on the Parted Magic live CD...I think you can also find it on the UBCD...