I am using laptop Samsung x520 and it has no CD Rom, now i want to change the windows, i copied all windows files to Memory and it is 100 GB when i want to boot , it doest not boot it directly go to windows. i select boot device from USB CD. if you know the solution plz teach me... i need very much, my windows is not working well, i can't do any thing.

It's possible that your disk-drive is "failing", and it's about to "die".

Buy a new disk-drive, connect it, and try to install to it.

Other possibilities:
* bad RAM in your computer is messing-up the file-copy operations, and the CD-reading operations
* dying motherboard is malfunctioning,
* scratched Windows CD-ROM media
* malfunctioning CD-reader device.

Find a computer with a CD-ROM drive.
Find a USB memory-stick that can hold 1 gigabyte.
Copy all the files from the CD-ROM onto the memory-stick.

Carry the memory-stick to the CD-lacking computer, and plug it in to a USB port, and install from there.

Systemax Ascent KMA3500 Desktop

Processor :AMD Athlon 64 X2 2.3 GHz
Installed Memory :2 GB (DDR2 SDRAM)
Operating System :Microsoft Windows Vista Business

Video Output Interface :PCI Express
RAM :2 GB

Max Supported RAM :4 GB
Installed Video Memory :128 MB
Supported RAM Speeds :800 Mhz
Hard Drive :160 GB
Hard Drive Interface Serial ATA II

CD / DVD :CD-RW/DVD-ROM (Combo)
Graphic Processor NVIDIA GeForce 6100

Integrated Audio Realtek ALC833
Networking
Networking Type Integrated 10/100 Network Card

Find a friend with a computer that does have a CD-ROM, and a USB port. Purchase a USB memory-stick that has at least 1GB of memory.
Get your friend to copy all the files from the CD-ROM to the memory-stick, including any "hidden" files.

Then, put the USB memory-stick into your computer, and install the software.

get switch audio converter software from www.nch.com.au
works for us like a charm

Please follow the below solutions to create either an audio CD-ROM of .wav files or back-up
.wav files to a CD-ROM.
Problem: .Wav files downloaded to PC computer from the DW-90, VN Series, and DSS Files
created with DS Series recorders cannot be copied to a rewritable CD-ROM using Windows
Media Player to create an audio CD-ROM.
Explanation: These digital voice recorders create .wav files at 8kHZ, 12kHZ, or 22kHz
depending on the Quality setting. Digital Wave player software is used to download Wav files to
a PC computer from the DW or VN Series of recorders. DSS Player is used to download DSS
files from the DS Series recorders and convert them to Wav files. If Windows Media Player is
then used to copy the files to a rewritable CD-ROM to create an audio CD-ROM, the files will
not copy properly or an error message may appear. Windows Media Player can only create an
audio CD-ROM if the .wav file is 44.1kHZ, 16 bit stereo.
Solution: Follow the procedure below to convert the .wav files to 44.1 kHZ, 16 bit stereo. Then
use Windows Media Player to copy the files to a rewritable CD-ROM.
1. Click Start, click All Programs, click Accessories, click Entertainment, and then click Sound Recorder.
2. On the File menu, click Open.
3. In the Open dialog box, specify the name of the audio file that you want to convert, and
then click OK. Files are usually located at C:\Program Files\Olympus\Digital Wave
Player\Message\Folder A.
4. On the File menu, click Save As.
In the Save As dialog box, click Change.
In the Attributes box, click 44.100 kHz, 16 Bit, Stereo, and then click OK.
Click Save. After you convert your files, try to copy them to a CD-ROM again.

1. Use the Windows XP Setup disks to restart the computer, or use the Windows XP CD-ROM to restart the computer.
2. At the Welcome to Setup screen, press R to repair the Windows XP installation.
3. Press C to repair the Windows XP installation by using the Recovery Console.
4. Type the number that corresponds to the Windows installation that you want to repair, and then press ENTER. For example, type 1, and then press ENTER.
5. Type the Administrator password, and then press ENTER.
6. Type map, and then press ENTER. Note the drive letter that is assigned to the CD-ROM drive that contains the Windows XP CD-ROM.
7. Type the following commands, pressing ENTER after you type each one, where drive is the drive letter that you typed in step 4 of "Method 2: Use the Recovery Console," of this article: copy drive:\i386\ntldr c:\
   
   copy drive:\i386\ntdetect.com c:\If you are prompted to overwrite the file, type y, and then press ENTER.

This is supposed to be caused by some missing registry entries in your windows installation. Not exactly sure why this is happening. May be you have some important files that cannot be copied due to a damaged CD. Microsoft replaces the media for you so that you can try installing using the replacement. Click here for more details
http://support.microsoft.com/default.aspx?scid=kb;en-us;326246
You can also try to recover the PC using recovery console. To do it follow the steps below
To complete part one, follow these steps:

1. Insert the Windows XP startup disk into the floppy disk drive, or insert the Windows XP CD-ROM into the CD-ROM drive, and then restart the computer.
   Click to select any options that are required to start the computer from the CD-ROM drive if you are prompted to do so.
2. When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
3. If you have a dual-boot or multiple-boot computer, select the installation that you want to access from the Recovery Console.
4. When you are prompted to do so, type the Administrator password. If the administrator password is blank, just press ENTER.
5. At the Recovery Console command prompt, type the following lines, pressing ENTER after you type each line: md tmp
   copy c:windowssystem32configsystem c:windows mpsystem.bak
   copy c:windowssystem32configsoftware c:windows mpsoftware.bak
   copy c:windowssystem32configsam c:windows mpsam.bak
   copy c:windowssystem32configsecurity c:windows mpsecurity.bak
   copy c:windowssystem32configdefault c:windows mpdefault.bak
   
   delete c:windowssystem32configsystem
   delete c:windowssystem32configsoftware
   delete c:windowssystem32configsam
   delete c:windowssystem32configsecurity
   delete c:windowssystem32configdefault
   
   copy c:windows epairsystem c:windowssystem32configsystem
   copy c:windows epairsoftware c:windowssystem32configsoftware
   copy c:windows epairsam c:windowssystem32configsam
   copy c:windows epairsecurity c:windowssystem32configsecurity
   copy c:windows epairdefault c:windowssystem32configdefault
   
6. Type exit to quit Recovery Console. Your computer will restart.

Source:http://support.microsoft.com/kb/307545

his behavior may occur if any one of the following conditions is true:

• Your Windows XP CD-ROM is scratched, smudged, or dirty. Clean the Windows XP CD-ROM with a soft cloth, insert it in the CD-ROM drive, and then click OK.
• Your CD-ROM drive is not working correctly or the CD-ROM might be vibrating too much for the laser to accurately read the data. For more information about this problem, see your hardware documentation or contact the CD-ROM manufacturer.
• If you are using multiple CD-ROM drives, your computer may be trying to locate files on the wrong drive. If your hardware has a feature to disable CD-ROM drives that are not being used, disable the CD-ROM drives that you are not using.
• Your computer is over-clocked. Because over-clocking is very memory-intensive, decoding errors may occur when you extract files from your Windows XP CD-ROM.
• Try to use the default clock timings for your motherboard and processor. For more information about how to do this, see your hardware documentation or contact the motherboard manufacturer.
• Your computer has damaged or mismatched random access memory (RAM) or cache memory. For example, you might be using a combination of extended data out (EDO) and non-EDO RAM, or different RAM speeds.
  
  Decoding errors may occur even if Windows appears to be running correctly. These errors occur because of the additional stress that is put on your computer when Windows tries to extract files and to access the hard disk.
  
  To determine how to make your computer cache memory unavailable while you are running the Setup program, see your hardware documentation or contact your hardware manufacturer.
• Ultra direct memory access (DMA) is turned on in your computer's CMOS settings, and the data is moving too quickly.
• Change from DMA mode to Processor Input/Output (PIO) mode to lower your data transfer rate. If this does not resolve the problem, lower your PIO mode settings. The higher your PIO mode settings are, the faster your data transfer is.
• You are using a third-party memory manager.
• There is a virus on your computer.

If you continue to receive this error message, copy the i386 folder from the CD-ROM drive to your local hard disk, and then try to run the Setup program from your hard disk.