How do I change my OS from Windows 7 to Vista?

My laptop wont start because it says that winload.exe is missing or corrupt. I really dont know what caused the problem since I shut it down properly the last time I used it. I am asked to insert the windows installation disc but I dont have one. I decided to switch to Vista since I have its installation disc but I really dont know how. Can anyone please help me how to change my OS? Would changing of an OS from Windows 7 to Vista cause harm?How do I change my OS from Windows 7 to Vista?
did you somehow drop your laptop ???? (i've experienced that before)

here is some suggestion :

1. pull off your battery, let your laptop out of electricity for about 10 seconds. it will reset all errors (if it can be reset).

2. just replace your 7 with vista, don't forget to back up your files though. And for the programs that come with your OS, it can't be saved (i think)....



hope that helps...How do I change my OS from Windows 7 to Vista?
Steps to Downgrade From Win 7 To Vista



STEP 1 – Locate Windows folder

The first step is to open the Windows 7 drive and locate the Windows.old folder in the drive. This is essential to change from Windows 7 to Vista and without it, this process would not be possible. Now you need to ensure that ample free space is available in the Windows 7 drive as all contents of Windows 7 is moved to a folder and the Vista contents from the Windows.old folder is copied.



STEP 2 – Reboot your PC

Now it is time to insert the Windows 7 installation disk in the DVD drive. Once this is done, reboot your PC. When the first screen shows up select your language, time and currency format and keyboard input method and click the ‘Next’ button.



Step 3 – Launching Windows7

Now the Install Windows window appears. Simply click on the ‘Repair your computer’ option to launch System Recovery Options dialog-box. You now need to select your Window 7 OS and click the ‘Next’ button again. Now you click on ‘Command Prompt’ to launch it.



STEP 4 – Move Windows 7 folders

In the next step, you will type the following commands in a serial manner and hit ‘Enter’ after typing each one of them. This action moves all the contents of Windows 7 to a new folder.

C:

Md Win7

Move Windows Win7\Windows

Move “Program Files” “Win7\Program Files”

Move Users Win7\Users

Attrib –h –s –r ProgramData

Move ProgramData Win7\ProgramData

Rd “Documents and Settings”



Step 5 – Copy Windows Vista files

Again the same process is repeated with a different set of commands that are given below and this ensures that the contents from Windows.old folder are copied to the drive.



move /y c:\Windows.old\Windows c:\

move /y “c:\Windows.old\Program Files” c:\

move /y c:\Windows.old\ProgramData c:\

move /y c:\Windows.old\Users c:\

move /y “c:\Windows.old\Documents and Settings” c:\



STEP 6 – Restore the Boot Sector

You have to restore the boot sector of your Vista OS by giving the following command.

D:\boot\bootsect /nt60 c:



Finally type ‘Exit’ to reboot your PC.



We have used the installation CD for Windows 7 to downgrade your OS from Windows 7 to Vista as per your requirement. We recommend that you check the security settings of the newly installed Vista and install antivirus software to protect your PC from external threats.



http://windows7.iyogi.net/upgrades/downg…
Hi Zabr,



Before going back to Vista, try some of your recovery options in Windows 7 - http://windows.microsoft.com/en-US/windo…



Or, try reinstalling under Advanced recovery method - http://windows.microsoft.com/en-us/windo…



Good Luck!



Cassandra

Microsoft Windows Outreach
You must first check online at the Web site of the manufacturer of your computer to see whether they offer device drivers that will work with Vista.



If the manufacturer of your computer does offer drivers that will allow Vista to operate all the hardware on your computer, then it is possible to successfully install Windows Vista to replace Windows 7.



However, you'll be losing all the other software that came with your computer. Some of that software is just rubbish, but some of it may actually be useful to you.



Of course, there is the problem of only being allowed to install Vista on one computer. You'd need to buy a license to install it on your Windows 7 computer. But, if you have money to burn, that won't be too much of a hassle.



At any rate, if you are successful at finding Vista drivers for all your computer's hardware, you can burn those drivers to CD or DVD for safe keeping. Then zero-write your computer's hard drive, boot from the Windows Vista installation DVD, partition your hard drive however you like it, then proceed with the installation.