I have no sound device installed after system clean up.

If your Dell computer had Vista installed then you can use your copy of Vista CD and you can use the product installation code that is printed on the Windows label that is attached to your Dell.
When you insert the Windows CD into your Dell and boot up your computer then select the CD as the boot device (ie 4=IDE CD).

After Windows is installed and activated then you need to install the Dell computer's device drivers.
You can download the device drivers from Dell WEB site, the support download page. Make sure you select your model desktop or laptop, better still, type in the Service Tag number, it is printed on the label on the bottom of the laptop and on the back or sides of a desktop. (If the Service Tag label is missing then go into the BIOS setting and on one of the BIOS pages, the Service Tag number will be displayed). This will open the page where the specific drivers for your model computer are located. Also make sure you select the Windows of the drivers for your Windows operating system. Click on this link to download the drivers: - http://support.dell.com/support/downloads/index.aspx?c=us&l=en&s=gen

Try booting into safe mode by pressing F8 at startup until the boot menu appears. Then select "safe mode with networking". If it boots into safe mode then see if your missing some drivers in device manager. If you are then download and install them. Next run some anti-virus and anti-malware programs to make sure your system is clean.

It appears the hard disk has been wiped/formatted and does not have an operating system installed.
You need to get a Windows Vista installation CD and if the Windows label on the bottom of the laptop is still attached then this label has the product installation code.
Boot up with the Windows Vista installation CD to install the Vista operating software then you need to install the Presario device drivers.

You can download the device drivers from the Compaq/HP WEB support/download page. Make sure you select your model laptop and the Windows drivers you require and install them. Click on this link to download the drivers: -
www.compaq.com/country/cpq_support.html

Ouch, it sounds like your laptop cannot recognize your operating system. When a computer boots up it looks for an operating system (such as windows) on differnet devices. For example: 1. hard drive, 2. dvd drive, 3. network card. You may have a dead latptop and need to reinstall the operating system.

Hi,

First of all, go to advanced boot options, and see whether last known good configuration works or not

can you boot into safe mode? If so, try to do system restore, if that doesn't work as well, try to do a clean boot, followed by an advanced clean boot and a hardware clean boot.. these steps might help ..

clean boot : http://support.microsoft.com/kb/310353

advanced clean boot : http://support.microsoft.com/kb/316434

hardware clean boot :
Follow the steps below to perform hardware clean boot
1. Right click on My Computer -> Properties
2. Hardware Tab -> Device Manager
3. Right Click on Sound Card, Video Adapter, Network Adapter one by one and click disable
4. Reboot the computer. If the problem is fixed then you can enable the hardware devices one by one to find the exact device that cause the problem

If these steps don't solve the problem, unplug any external devices from your computer and see whether that resolves the problem .

If nothing works, try doing system restore from winre, if that doesn't work as well, you'd have to do that manually,

try these steps,
go to WinRE) open folder C:\Windows\System32\config

and rename these files:

BCD-TEMPLATE ->BCD-TEMPLATE.OLD
DEFAULT->DEFAULT.OLD
SAM ->SAM.OLD
SECURITY ->SECURITY.OLD
SOFTWARE ->SOFTWARE.OLD
SYSTEM ->SYSTEM.OLD

(don't change COMPONENTS file because system don't store any copy of this file,BCD-Template system will reconstruct automatically when you boot into WinRE)

Next navigate to C:\Windows\System32\config\RegBack folder and copy all items to C:\Windows\System32\config

Next boot into WinRE and try again restore system to previous checkpoint.

The last option would be to format your root drive and install the OS again..

Hope that helps, and good luck

your operating system got corrupted.
please reinstall or repair operating system with CD.

can you get into the bios settings and change the boot device priority? if not then you need to check if your hard drive is working, try replacing it a new one. if problem still persists, then you need to check the ide cable or sata which is connected to your hard disk and through your laptops motherboard. If problem still persists, then you need to reset the bios settings of the laptop by taking out the cmos battery located inside the laptop and put it back. pm me if the problem still persists. Thank you .

Something has messed with your MBR, master boot record, which is a small sector at the beginning of your first hard drive which tells the bios which partition to boot. You'll have to use your xp or vista's installation disc to repair the system.( Choose; repair this installation of windows when prompted )
While you are in the bios check under the boot section the order of your boot devices. If you have more than 1 HD check that the one containing your OS is first.

It sounds like a problem loading the operating system. Try booting from an installation CD to see if anything comes up... if it loads from the CD, there could be a problem with your hard drive.
When it turns on, try entering the BIOS by pressing the correct key (usually DEL, F10, F12, or F2) Make sure that the boot device is set to your hard drive. If you do this and it loads with an error saying 'insert boot media' or 'boot device failed' you'll have to either try fixing your boot sector (which can get tricky, but I'll walk you through it if you really want to attempt it) or a much easier fix, reinstall the operating system.