How to remove the extra windows edition in my laptop?

Based on the description given by you, It seems your another partitions admin settings restrict you from doing anything with data. And also file permission restricting you to delete the existing windows folder and format the partition. In such case you have few options to be performed.

1. Low level format with MBR options.
2. format the device by connecting the hard disk as slave on another computer.
3. format with GUID
4. format from another Windows 64 bit OS on your partition

1. Format with MBR
Formatting with MBR can rewrite the boot records and delete the data. As this formatting process doesn't go through windows install. You can easily use this to get rid of the content on the disk.

2. Format with GUID.
You may find limitation for the MBR partition. And that can be easily managed with the GUID partition system. The data is also removed in this type of partition system.

Both GUID and MBR system requires you to partition with admin rights if done from the Windows. If you do it using the rescue disk, then you may not face such issues. So use the rescue disk the next time you format any drive or partition with low level MBR or GUID options.

3. Alternative options also applies by connecting your HDD as slave to another computer. Your existing HD's file restriction may not apply in another OS. So you may easily manage to remove the files from the partition.

4. If you wish to remove the content from another partition on the same drive then make sure that 64bit OS has software such Partition Magic or Genie Disk manager. These apps can help you remove the content from partition and use the format option. Also Windows has it's own partition manager that you can use.

So these are 4 possible options for you to remove the content and format the partition of your choice.

This issue is normally caused by Bootloader files when they are mixed up. Local Disk C being your primary storage for OS installation, Windows always stores a bootloader to boot up your files. This is the reason you are facing issues while deleting the folder.

Generally, to solve this issue you will have to perform a complete wipe-up of your system and install new OS.

If you own a USB Drive, then you can use it for installing new version of Windows.
Note :- You can use any version of Windows, let it be 32 bit or 64 bit.

1. Download Power ISO from their official website.
2. From Menu choose Tools -> Create a Bootable USB Drive.
3. A new menu will popup in which you will have to choose your Windows ISO file.
4. Right after choosing the installation file click on Start button and wait for the process to be complete.

After completion of the above procedure, you will have to just plug-in USB Drive and restart your device. Press F12 simultaneously and choose your USB device. It will start installing Windows.

There you will have option to format Hard Drive. Go for it and everything will be fine afterwards.

Please backup all your files.

Unfortunately in the attempt to delete the other OS, I changed the new OS drive f as active partition and tried to format but it said drive with boot files cannot be formatted.

Then I ran msconfig and deleted the old OS from boot menu.

On restarting now it says boormgr is missing. I don't know what to do.

I cannot boot using the pendrive as the OS files contain a setup file that can be double clicked to start the install from existing windows ui.

Help me.

The Windows guide on removing the additional OS states this -

1. Start the Windows installation you would want to keep.

2. Click on START and type in windir. Click OK>. Note down the folder that opens up.

3. Find the Windows folder you wish to remove on Windows Explorer.

4. Right click on it and click on Delete.

5. Click on Confirm to delete.

6. Click on START, right click on Computer and then choose Properties.

7. Locate Advanced tab and choose Settings under Startup and Recovery.

8. Click Edit under System Startup.

9. Edit the boot.ini file and save it.

The message Bootmgr is missing indicates that boot sector of your OS is corrupted. You may need to perform the following steps to solve the issue.

1st Method

You will need to have the Windows installation disc to use this method.
1. Insert the Windows Installation Disk and start your PC.

2. Press any key when the message appears.

3. Choose the appropriate language, currency, time and input method.

4. Click on Next.

5. Click on Repair your computer.

6. Choose the drive on which your Windows OS is installed under the System Recovery Options message box and click Next.

7. Click Repair Your Computer on the next screen.

8. Choose the OS you wish to repair and click Next.

9. Now, click Startup repair.



Method 2

1. Follow the steps from 1 to 8 above.

2. In the last step, choose Command Prompt.

3. Type in Bootrec /RebuildBcd and enter .

This will rebuild boot configuration data (BCD).

Method 3

1. Follow steps 1 to 8 as above.

2. Choose System Restore in System Recovery Options box.

3. Choose the restore point you want your system to restore to.

4. Click on Finish to begin the restoration process.

Method 4

All the above methods assume that you have Installation disc with you. If you do not, you may use the method below. You should have Startup repair is preinstalled on your computer.

1. Remove all the removable drives on your computer.

2. Restart your computer.

3. Press and hold F8 key,

4. Use arrow keys to highlight Repair Your Computer under the Advanced Boot Options.
Please note that Repair Your Computer will not appear if your computer does not have the recovery options preinstalled.

5. Choose the keyboard layout and click Next.

6. Choose a user name and password. Click OK.

7. Under System Recovery Options, choose Startup Repair.

Unfortunately in the attempt to delete the other OS, I changed the new OS drive f as active partition and tried to format but it said drive with boot files cannot be formatted.

Then I ran msconfig and deleted the old OS from boot menu.

On restarting now it says boormgr is missing. I don't know what to do.

I cannot boot using the pendrive as the OS files contain a setup file that can be double clicked to start the install from existing windows ui.

Help me.

Sundarmani, I think the whole OS just got screwed. Now you need an OS installed a driver to reinstall the OS from the start. If it's not with you, just go to a repair center or you can visit service center of the laptop company and they will solve the whole problem.

It can cost you a bit but the safest thing to do now. If they quote a high price then you can check it up in the normal repair stores they will install the OS with your required configuration.