HAVE A DELL DIMENSION E521 DESKTOP PC WITH A WINDOWS VISTA OS. I HAVE THE DISK FOR THE CAMERA . WHEN I INSTALL THE DISK RUN THE PROGRAM FOR DOWNLOAD I GET A MESSAGE THAT SAYS A SERVICE INSTALL SECTION IN THIS INF IS INVALID.

Try running the Check Disk Utility.

To run the check disk utility you will need a repair disc ora operating system disc. Put the disc in the cd drive and boot fromit. You want to get to the Dos Command Prompt (Black screen with whiteletters) and type the following command: chkdsk /r
Check disk will run well over an hour or two and you will notice thepercentages going from high to low, this is normal. Let it run tocompletion. Then reboot machine.

If check disk fails to solve your problem you might have to reinstall windows.Try doing a Repair Install that way you don't loose your data, documents,music, pictures, videos or programs.

In windows xp you get to the dos command prompt by selecting R for repair whenthe options appear.

In Vista and Windows 7 you want to get to the recoveryconsole and look down at the bottom of the window for the Dos Command.

Sounds like you boot menu has been corrupted the disk that its asking for is a windows intallstion disk if you have it I would put it in your cd drive boot from the disk and select repair. Please carify your operating system.

try method 5 listed on this site:

https://support.microsoft.com/en-us/help/314060/your-cd-or-dvd-drive-is-not-recognized-by-windows-or-other-programs

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/larry_1fe25e09c54eece2

Windows XP:
http://support.dell.com/support/downloads/download.aspx?c=us&cs=19&l=en&s=dhs&releaseid=R132395&SystemID=DIM_P4_E521&servicetag=&os=WW1&osl=en&deviceid=8907&devlib=0&typecnt=0&vercnt=1&catid=-1&impid=-1&formatcnt=0&libid=3&typeid=-1&dateid=-1&formatid=-1&fileid=175946

or

http://support.dell.com/support/downloads/download.aspx?c=us&cs=19&l=en&s=dhs&releaseid=R127097&SystemID=DIM_P4_E521&servicetag=&os=WW1&osl=en&deviceid=9326&devlib=0&typecnt=0&vercnt=1&catid=-1&impid=-1&formatcnt=0&libid=3&typeid=-1&dateid=-1&formatid=-1&fileid=169315

Hello,

The problem is with the corrupted boot files .In my opinion you have one solution
Steps for solution

1. Download an operating system called ' Linux mint ' which can be installed in the pen drive having minimum 4 gb capacity . Using this operating system you can access the computer .

2. Copy the file and folders to an external storage device (external hard disk, pen drive etc..)

3. Reinstall the operating system ( XP,Vista ,Window 7,Ubuntu etc )

Hope you be successful

Hi,
Please go to the Dell website again. You should be looking for a LAN driver. Make sure that you are downloading drivers for Windows XP.
If that doesn't help visit broadcom website.

Use ISO startup / recovery disk downloadable from here: http://neosmart.net/blog/2008/windows-vista-recovery-disc-download/

Go into your BIO's at startup and set it to load from the CD-Rom only. Then drop the Vista disk in the CD-Rom and restart the computer. After it loads you will need to go back into the BIO's and set it back to where it was before you made this change.

There must be some disks with the PC. Your internet provider should have supplied you with drivers when you bought your modem, else you wouldn't have got it to work with Vista either. If you install these drivers you should be able to get on the internet, and download the rest. If you can't find the disk, please post what provider and modem you have, so I can find the drivers for you.

there is an option called programs and features ...
and if u want to install a program install it in a normal way