How do I re-install the operating system for eee pc900hd with no disc or internial disc drive?

your operating system is located on the hard drive if you still have the old one and it works put it back in make a back up copy on cd remove and reinstall new on and load operating system to new hard drive.

Add more RAM. Clean up the desktop. (windows pre-loads everything on your desktop) a three gb music folder on your desktop will have a massive effect upon loading times. reduce the number of installed fonts to less than 150.

To start the systemrecovery:

1. Restart the computer.
2. When the Computer logo appears on the screen, press the Alt and F10 keys repeatedly.
3. If you are prompted with a Microsoft Windows boot screen, press the Enter key.
4. After the system recovery application has loaded, follow the prompts to reinstall the Operating System.

If the ability to reinstall from the previous method is not available orfails, recovery of the Operating System will need to be from Recovery Media. Ifyou do not have a set of Recovery Media, you may purchase the set onlinefrom the manufacturer.Note: If your computer does not havean internal optical disc drive, an external optical disc drive will be requiredin order to recover the Operating System using Recovery Media.

1. Restart the computer.
2. When the computer logo appears on the screen, press the F12 key repeatedly to enter the computer's Boot Menu.
3. Press the CD-ROM drive eject button and insert the disc labeled System CD.
4. Close the CD-ROM tray.
5. Refer to on screen instructions to select either CDROM or USB CDROM.
6. The computer will boot from the Recovery Media
7. When prompted for the Recovery CD, remove the System CD and insert the Recovery CD.

Note: Ifthere are multiple Recovery CDs, please insert the first of the Recovery CDs.

1. After the system recovery application has loaded, follow the prompts to reinstall the Operating System.

You don't need an installation disc, just plug it in.

Hi.
If you have not changed the pre-installed Operating System that was shipped with the Computer, then you may re-install the Operating System by using the Recovery Partition in the Hard Drive or the Recovery Discs.
All the OEM(Original Equipment Manufacturers) provide the Recovery Partition in the Hard Drive or the Recovery Discs.
By using any of the above options, you may format the Hard Drive and re-install the Operating System.
Hope this helps.
Please feel free to contact for further information and assistance.

Well the easiest way to narrow the root of the problem would be to eliminate whether or not this is a software related problem.
So basically you will want to do a fresh install of the operating system. If this fixes the issue GREAT! if not your keyboard is more than likely experiencing a short.
Think of your keyboard as a grid of horizontal and vertical wires, when you press a key, that key makes 1 horizontal and one vertical wire connect this tells the computer which key is being pressed that it is also making a connection for the spacebar.

If you need more clarification or help feel free to leave additional comments but I would start with backing up any files you have and formatting the harddrive and reinstalling the operating system

Connect a USB CD-ROM and install a new OS - or if you can get the same Operating System (OS) disc from a friend use it to repair your system.

Its the only think you can do really.

If this was at all helpful please vote kindly

its going to need to be reinstalled, if you don't have a cd drive you should take the laptop to your dealer if they can do the reinstall or a local professional who surely can do it.

Dell OS CDs are OEM versions which mean you can not install them on any other systems. Sorry for the bad news.

Ok your gonna need a couple of things to put XP on the Linux Eee PC.

A usb 2.0 CD or DVD
The Offical windows XP service pack 2 disc from Microsoft
A usb flash disk larger than 1 gig or an external harddrive
ASUS PC Eee support CD from original package.

If you have those things the ASUS Eee XP installation instruction manual can be downloaded here