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Since you haven`t mention the operating system in the query, i believe the operating system as XP
the one method to retain your data and change the password is to repair your pc desktop, so kindly follow the below steps
XP Operating system REPAIR
Set your first boot device in the Bios to CD-Rom. Insert your Windows XP CD, save the bios settings and exit. Soon "Press any key to boot of CD" will appear on the screen, hit the space bar to continue.
Now setup will inspect your hardware and software, it then will load various files required for the repair. Just wait and be patient, this may take a few moments.
Soon a menu will appear (as pictured below), press enter to continue.
Now the "End User Agreement" Press "F8" if you agree, "ESC" if you don't.
You will now have to select the installation you wish to repair. Usually there is only one, but sometimes, there may be 2 or more (i.e. you have done a parallel install to resolve a problem), use the up/down arrow key to select the install, and then press "R" to continue.
Setup will now examine the disk be patient, it can take a few minutes.
Setup will go through a percentage - 1 to 100%
A screen will soon appear. Press "F3" to continue
Now setup will reboot system, wait 15 seconds or just press enter.
Now it is time to see if this has solved your problems.
When booting up press F8 and boot in safe mode then run MSCONFIG and make sure your computer turns on running only basic programs. It could be you have a program running that is causing it to freeze as soon as you boot up. If it still freezes in safe mode you might need to repair windows using the original CD.
check if the cable from the cd rom connected to your ibm pc if its ok , also check the master, slave configuration pins into the back of your cdrom. make sure that theres no conflict between the hard disk and the cdrom. Your cd rom may probably cannot be detected. make sure that it is working first. then install the hard disk. The hard disk must be in primary master and the cd rom must be in primary slave. then try booting it to your cd rom. also, try checking if your windows xp setup disk is bootable, it means that it can boot from cd rom. PM me if you have other experiences after doing what i adviced. Thank You.. heres my email. firstname.lastname@example.org
Kindly repair or reinstall your Operating system. It has a file that has been corrupted. To avoid the damage become big try to repair it or reinstall the OS without reformatting or erasing the files save in your hard disk. Kindly follow the steps below:
To repair/Reinstall your operating: 1. Insert your CD installer into your DVD/CD Rom then reboot your computer/Laptop. 2.
Press F8 or F12 to enable boot sequence and display it in order to select the boot. Then select the DVD/CD Rom boot. Or Press Del to enter
CMOS and set the boot configuration sequence and select the DVD/CD Rom
as your priority to boot the system. 3. *** soon as message will
display "Press any key to boot CD" then press any key to boot CD. Then
wait for the CD to load all its components. 4. After loading all its
components kindly follow the instructions givien by the installation
wizard. Note that if you where ask by the installation wizard to press
r to repair or enter kindly select enter then let the system detect the
existing installation of OS in your system then it detects then press
enter then kindly select "Repair" to repair the detected OS or Select
"Don't make changes and make it intact" then enter to reinstall the OS
without erasing the files save in your hard drive. 5. Kindly follow the instructions given by the installation wizard to finished the installation or repair of your system OS. 6. If you don't want to repair/reinstall by your self then you can contact a technician expert in computer to fix it for you.
If you need more assistance kindly reply to this post.
try with other disk if all disk getting same issue then you have to first clean your cdrom or dvdrom lense. For that you need disk cleaner disk pur chase it and put in rom then play it. then it clean lense.then check. if still face problem then you need to repair or replaced lense if it in warrenty replace it.
Put original Operating System CD into drive, boot computer from CD and start reinstalling system. When you get to screen that says you can press "R" to repair the Operating system, press "R" and see if it can fix the system. Once it's running, be sure to check for Malware (use Malwarebytes) and viruses (use Vipre-rescue) - and get a good registry cleaner (Cleanmypc) and clean up the registry. If repairing the OS doesn't work, then you'll probably have to format and re-install everything. Being a Compaq, watch the screen for a "Restore" function, and follow the prompts.
My first method will not lose you date, the second one will. Restoration will format the drive and you'll lose everything.
Formatting your hard-drive is the easiest way to eliminate anything on that hard-drive. Follow my steps below to do just that.
Start your computer so you can open the CD-ROM drive. Insert the Windows Installer into the CD-ROM drive. Close your CD-ROM Drive. Shut down your computer.
Now start your computer and while your system starts up look for an option for the, "Boot Menu" or, "Boot Device." It will have a key associated with it that you have to press continually for you to enter the menu. For instance:
(F8) Boot Menu.
Here's a hint to help you out. If you see the loading screen of your operating system, you've missed your window. Restart and try again.
Now just to clarify, we're not out to change the boot sequence, we're trying to boot from a specific device. Once you find that menu select your CD-ROM drive and press enter. It might ask you to, "Press any key to boot from CD-ROM drive." As it mentioned, press any key. Afterward the Windows Installer will launch.
Follow the directions on the screen to set up Windows. Yeah, it will warn you that there is another OS installed on your primary Hard Drive and that it might be better for you to, "Repair" your system. Ignore that and continue with the process to Install Windows. Before the final step to install Windows there is a screen that allows you to partition your hard-drive. In this are, erase ALL partitions. Afterward create a new one which will be your C:\ drive. If you want to partition your drive further, go ahead. However, at this point you can continue the Windows Installation and the Installer will ask you if you want to format with the NTFS or FAT32 type. Format with the NTFS type.
Now the Windows Installer will erase EVERYTHING on your hard-drive and proceed to install Windows XP.
After format your computer will not boot if don't have the Sys files on it. Try to put your hard drive back to your computer and start booting with some cd with hard drive utilities like http://www.ultimatebootcd.com/