How to change XP Serial/License number

Go to / Start Menu/ Run/ Type regedit and click OK.

Before any operation in the registry, he should make a backup of the registry as a precaution

• In the Registry Editor, click File then Export and save the registry at a place where you can find the file.
• Expand the options until you get the key:

  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\windowsNT\CurrentVersion\WPAEevents

• Then on the right panel, change the value OOBETimer by changing the number.
• Close the registry.
• Start Menu> Run> Type:

  %systemroot%\system32\oobe\msoobe /a

• Choose Activate Windows by phone, then click Change Windows key and then enter your new key and click Update.

Making Error disk Checking

Checking in Safe Mode

Restart the computer in Safe Mode (press repetitive F5 or F8 during startup before loading Windows).

Open My Computer (icon on the desktop),
Click the right mouse button on the disk you want,
“Properties”> tab “Tools”> Click “Check Now …”

Verification at startup

Open an MS-DOS window (Start Menu> Run> cmd> OK),
Type: chkdsk c: / F
If the computer asks if you want to check on the next restart, confirm with O Input, and then restart your computer.

This solution is recommended because it allows Windows to perform an audit of the disc before the programs started.

Making a checkdisk

Below are two proposed solution of how to check your hard disk:

Checking in Safe Mode

Restart the computer in Safe Mode (press repeatedly F5 or F8 during startup before loading Windows).

Open My Computer .

Click the right mouse button on the disk you want,
“Properties“> tab “Tools“> Click “Check Now …”

Audit start [Recommended]

Open an MS-DOS window (Menu Start > Run> cmd> OK),
Type: chkdsk c: / F
If the computer asks if you want to check on the next restart, confirm with O Input, and then restart your computer.