How to fix error code oxcoo4eoo3. I cant use the new keys I put in for windows 7

you need a valid windows key to run windows 10. if you upgraded from win 7 your key would be valid. its a trip to microsoft to validate win 7 key or new key purchase.

Are you sure you're typing all the letters correctly? Look closely at B and 8, G and 6, etc. Product keys do not contain 1, I, O, or 0.

Are you using the correct Windows 7 key? A key for XP or Vista will not work with Windows 7. A Home Premium key will not work with Ultimate, etc.

Note: Make sure you are not installing windows on more computers then allowed.

Call Microsoft Using the Manual Phone Activation

If you have trouble activating Windows 7 you can call Microsoft to activate by doing the following:
1. With Windows running click Start, then in the Search box type: slui.exe 4
2. Press Enter on your Keyboard
3. Select your Country.
4. Select the Phone Activation option, then call the number given and hold for a real person.

This error mostly appears due to windows update. If you are trying to update windows error then this microsoft link can help you:
http://answers.microsoft.com/en-us/windows/forum/windows_other-windows_update/cant-install-win-7-sp1-error-code-returned/c8c38825-e838-46c3-940e-417e0a7cb47a

Also use a system utility software like RegInOut to fix such kind of windows errors.

you can go www.aakeys.com for windows key, after i used it, my windows return good

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Contact Acer with your information, they will send you the keys.

To resolve Windows 7 Error Code 5, all you need to do is start the installer through a different installer. Either find an old Windows XP boot disk and then direct it over to the Windows 7 installation DVD and run Setup.exe. This should kick off the installer normally and allow you to install the operating system.

I know this is not what you will want to hear, but according to the Dell Support site, error code 2000-0146 indicates: DST Log contains previous error(s). This means that the drive is failing and needs to be replaced. ASAP is best. I would suggest that you backup anything on the current drive that want to move to the new drive. If the computer is under warranty, contact Dell Support and they should ship you a new drive. If there is no warranty remaining, you will need to purchase a similar type of drive. Once you have the new drive, install it and then reinstall your software. It should go more quickly is you can use the recovery CDs that were shipped with the computer originally.

Good luck, and please let me know how it turns out for you.

~ Spoem