The disc should look like this:

It might be a different colour. What do the labels on the other 5 discs say?

I did not see a pic or anyhting rleated in your post.

My disc is orange,it states the following:

REINSTALLATION DVD
MICROSOFT WINDOWS XP MEDIA CENTER VERSION 2005 WITH UPDATE ROLLUP2

I ran two unsuccessful "sfc/scannow"  scans.Each time the dialog box would open prompting me to
re-load the dvd.

Any suggestions?THNX~

You must have XP Media Centre Edition opposed to Professional then. Have you attempted to use this DVD when prompted.

First,may I inquire if this is the correct disc?

Yes,this is the XP MEDIA CENTER version.

There are 4 other discs that came with this computer,but when I inserted them,
I rec'd an error message.

I also tried the following procedure:

type mmc in the RUN box;CONSOLE MENU;click ADD/REMOVE SNAP IN
double click RESTRICT CD-ROM ACCESS

THANK YOU~

I am not sure why they would suddenly become missing. Have you used any registry cleaners? What security are you using?

Download and install Malwarebytes' Antimalware free version, then update and run a scan.

Also download and install ccleaner run the cleaner and then registry cleaner.

The problem is that each time I run a "sfc/scannow"  scan the dialog box would open right before it was done with the scan and would not finish,prompting me to re-load the disc over and over.

Is this a virus or something that is not a serious issue?

Thanks~

Do I need to re-install Windows XP and if so can I do it with the aforementioned disc?THNX~

Hi there should be a sticker at the side of your system or base of it is a laptop). If the sticker says XP Media Centre Edition, it is the correct disc.

You may reinstall Windows XP using that disc. Follow my guide below for instructions.

I mentioned above to use Malwarebytes' Antimalware to scan your system from malware and to use ccleaner to clean your computer (and registry cleaner) however it needs approved for some reason.

Personally I would do the clean install.

SFC requires a disk that matches your current Service Pack level.  If your disk came with SP2 and you are running SP3, it will be looking for an SP3 disk, as some of the files have changed.  In some cases, it even requires media that is the same distribution (VL, Retail, OEM).