Hello
You should use the Windows Setup program to repair the installation. To do this, follow these steps:
1. Use the Windows XP CD-ROM to start your VM(Change boot sequence to CD-ROM,Hard Disk,Floppy). On the Welcome to Setup screen, press ENTER to set up Windows.
2. Press F8 (F8+fn) to agree to the license agreement.
3. Use the ARROW keys to select the Windows installation that you want to repair, and then press R.
Windows Setup repairs the installation files, Windows automatically restarts, and then the Setup program finishes the repair of your Windows installation.
4. Follow the remaining steps to set up Windows.