No Operating System found

Prior to the 'no operating system' message is the HDD being successfully detected? If its not - open the case and check the power and data cable connections. Change the cables if that doesnt work. If changing cables doesnt work try the HDD in a different PC - if that don't work its dead.

If it is being detected try booting from a floppy with fdisk on it and running that with /mbr option. If that doesnt work - windows setup and the repair option that needs the disk that no one has or a fresh install are your options.

What you are describing can be down to two items one is the HDD itself either becoming corrupt or it's died or the Controller has failed.

If the BIOS will not recognise the HDD they it's a fair bet that the drive is dead but if the BIOS sees the drive but will not boot from it then either it's been corrupted or it has died a natural death.

I would depending on what tools you have available my first option would be to insert a copy of a live Linux into the CD ROM and boot from that Knoppix will allow you to read any NTFS Drive and see if it's formatted correctly. Failing that you could try the drive makers testing utility or even the Ultimate Boot CD to do some testing.

http://tinyurl.com/3jnpy

1. You need to check that PC has the hard drive installed
This can be checked in the bios setup
The bios is the program that starts the PC and loads the Operating system (Windows)
Most computers show something like this on the screen
?Press del to enter setup?

2. You need to check if the hard drive has an active partition
This can be done with the windows 2000 disk
Just use the bios setup to choose the boot order
Set the cd/dvd drive to boot first
Some PCs give you a boot menu

3.You need to have a bootable Operating system installed on the hard drive
Again you can use the windows 2000 disk

No Operating System found

Can mean the hard disk has been formatted and there is no bootable Operation system

It can mean there is no active partition on the Hard drive

It can be missing the start-up files

A virus can cause these things

Things we need to know from you

Do you have the Windows 2000 disk(CD)

Do you have the product key
It looks like this (12345-67890-ABCDE-FGHIJ-KLMNO)
Those are not the right numbers or letters so don?t try them
It may be on a sticker on the computer case
Do not write the code in any of your replies

Do you know what was the last thing to happen to the Pc before it failed?

Some one will help you if you get back with some answers

when resizing partition using Ubuntu Linux,
I had it installed on virtual

I got operating system not found error.. even though I resized using free space... so thats the last time I do that ...

one I did resize, it said OPERATING SYSTEM NOT FOUND

SAFE MODE, last known good configuration and other stuff will not work..

1.I BOOTED FROM XP CD, ensuring cd was a boot device.. (on dell inspiron 6400 you press f12 and then select cd-rom from the device list)
2. see if Repair Installation is available
if yes.. do a repair installation I guess...
if no... restart machine, boot from XP cd again, then
go to RECOVERY CONSOLE (press r when prompted)

3. in recovery console it should fix c: and say unreadable perhaps... when you try dir ..

type:
fixmbr
fixboot
it will say ONLY do this if you can't boot, which should be the case.
4.

could not load autochk.exe
now you shoudl be able to see the windows loading screen.
The problem is a HIDDEN partition.
when windows loads it will say
could not load autochk.exe
http://www.pchell.com/support/autochknotfound.shtml

Now I have a LAPTOP with no floppy drive, and I wasted a good at least 10 CDs trying to get the thing to boot, and fix what I needed.

Basically you need any tool that can create a bootable CD(for laptops ..) allowing you to hide or unhide partitions
i.e. changing the partition type number.

Solution: GET ACRONIS PARTITION EXPERT

I am not sure if the trial can burn to a cd, but the professional version can, and then you boot from this CD, and follow the instructions at
http://www.pchell.com/support/autochknotfound.shtml
which basically involve changing the partition to NTFS type(assuming it was NTFS originally I guess..)
0x07
if you tried to install Ubuntu Linux the number will be some Linux number like 0x17... so change to 0x07

Alternate Solution: get a bootable floppy with ptedit and boot from it
ftp://ftp.symantec.com/public/english_us_canada/tools/pq/utilities/ptedit.zip

The number here should generally be 07 (hex), meaning the partition is an "Installable File System", in other words a bootable drive. If its anything else its not bootable.

Using your tab key, tab down to the Type box and hold down ALT + T to open the Set Type menu, then with your keyboard arrow, select 07, tab down to Ok and press Enter

8) Hold down ALT + S to Save Changes to the partition table and then Press CTRL +C to exit out of the program.

COnclusion:
the problem is if the number is not 07... it is a hidden partition.