Invalid disc prompt,whenever i install a disc

Hello,
Follow these steps:
Turn your computer on, booting from either your Windows 7 Installation DVD or Windows 7 System Recovery Disc. Remember, you may need to change the boot order inside your BIOS to have the your DVD drive boot first.
After the installation or recovery disc loads, if prompted, select your language settings and then continue. If you are using the installation DVD, when prompted by the following screen select Repair your computer.


Check this steps.

This issue may occur if one or more of the following conditions are true:

• The basic input/output system (BIOS) does not detect the hard disk.
• The hard disk is damaged.
• Sector 0 of the physical hard disk drive has an incorrect or malformed master boot record (MBR).

Check your BIOS or System Setup to see if it detects your hard disk drive.
If it does see your hard disk drive then follow these instructions to fix your master boot record (MBR)
windows XP XP Repair or Fix Master Boot Record Using Recovery Console
windows 7
Step one: Turn your computer on, booting from either your Windows 7 Installation DVD or Windows 7 System Recovery Disc. Remember, you may need to change the boot order inside your BIOS to have the your DVD drive boot first.
Step two: After the installation or recovery disc loads, if prompted, select your language settings and then continue. If you are using the installation DVD, when prompted by the following screen select Repair your computer.
Step three: The computer will take a moment now to scan itself for any Windows installations, after which you will likely be given a choice to select which installation you wish to repair. Select the appropriate Windows installation from the list and then continue. If by chance a problem is detected in one of your Windows installations at this initial stage, the system may also ask you if it can try to repair the problem automatically. It is up to you if you wish to let the system try to repair itself, but otherwise just select No. Step four: Once you have reached the System Recovery Options screen, as shown below, you will be faced with a list of choices that can aid you in repairing a damaged Windows 7operating system. If you wish to try the Startup Repair option first, it is often successful in automatically fixing many different start up issues, but in this article we will be using the Command Prompt option to resolve our problems manually. So, click Command Prompt to continue. Step five: Now sitting at the command prompt, enter the following command and then press enter:
bootrec.exe /FixMbr
While the above command does fix the MBR, and sometimes that is enough, there still might be an error with the system partition's boot sector and Boot Configuration Data (BCD). This might occur if you have tried to install another operating system alongside Windows 7, such as Windows XP. To write a new boot sector, try the following command: bootrec.exe /FixBoot

hope that helps

I find that I get the Invalid disk message most likely when I use a DVD-R disk. So now I use only DVD+R for this machine. I have also read somewhere that the problem could be solved by using a Laser Lens Cleaner Cleaning disk.

System will show CD as C: and "COPYING" doesn't make drive "BOOTABLE".
You have to let the restore CD do the whole process of FDISK, FORMAT and INSTALL.
If you want HD bootable with no "WINDOWS"
use this command at A: prompt.
FORMAT C: /S
I'd have to get out my Win/DOS notes for more.
Try "Help Format" if that doesn't work.
I would Let the CD do everything if you are not familiar with DOS installs.

TILO DVDR04 PLAYER RECORDER THE DVD RECRDER IS IT SPECIFIC TO THE DVD RO4 CAN IT BE REPLACED WITH ANY PLAYER BURNER IT SEEMS TO PLAY NORMALLY.

The free CDBurnerXP Pro is supposedly able to close unclosed disks, but I have never figured out how to do it. Maybe you'll be luckier than me or the newer version is more user friendly.

the lens of the dvd player is either got dust on it so please clean that lens and then try.
also try that same disk in another player.

Try using Sony +R discs. or +RW's are good, any brand as long as they are +'s. For some reason alot of +R discs brands will not work, I wait and just get Sony +R or the +RW's on sale and stock up and I have no more troubles. Mine is the 05MU. The ZU is a little strange with the RW but will still record. Hope this helps.

In many devices, DVD-R and/or DVD-RW discs do not work. You must use DVD+R or DVD+RW discs. Good luck!

Hi,

Did you try a disc cleaner? Maybe the lens is just dirty.