Disable USB thumb drive in windows xp

To Block USB in Windows XP

1. Click the Start button and select Run.

2. Then type regedit in the box and click OK.

3. When the Registry Editor is started, you need to expand in the left Pane HKEY_LOCAL_MACHINE>System>CurrentControlset>Services>USBSTOR

4. When you have expanded ,in the right pane , you will see an entry called “Start” where value of the start would be
0000000(3),edit the value by double mouse click and type 4 and click oK.
(4- To Block the USB
3- To UnBlock the USB)

6. Close the Registry Editor and refresh(F5), then notify Changes.If that does not work for your computer, then you will have to log out and log in to activate the changes.

How to uninstall unbuntu (linux) from dual boot xp

When you have a dualboot system (say Linux and Windows),Mostly you have GRUB as bootloader.When you remove Linux,you will face some problem like GRUB bootloader Failed.
To overcome such problem you need to go with the following steps.

This is how you can delete/remove Linux from a dualboot system with Windows XP. First take out your Windows XP bootable disc & boot your system from it. Then enter Recovery console by pressing R.

In the recovery console prompt type the following commands: FIXMBR, FIXBOOT .The GRUB will be overwritten & Windows will restore MBR & its bootloader. Just boot your system & windows will start automatically. Now Right click on My Computer icon on your Desktop & click Manage. Click Disk Management. Now remove all Linux partitions (These partitions don’t have any label & have unknown filesystem). Now create new partition(s) in the free space. Format those partitions in FAT32/NTFS & now you can use them under Windows.