File Changing All Times !

To get into the Windows Vista and Windows 7 Safe Mode, as the computer is booting press and hold your "F8 Key" which should bring up the "Windows Advanced Options Menu" as shown below. Use your arrow keys to move to "Safe Mode" and press your Enter key.

Note: With some computers if you press and hold a key as the computer is booting you will get a stuck key message. If this occurs, instead of pressing and holding the "F8 key", tap the "F8 key" continuously until you get the startup menu.

Trouble Getting into Safe mode - If after several attempts you are unable to get into Safe Mode as the computer is booting into Windows, turn off your computer. When the computer is turned on the next time Windows should notice that the computer did not successfully boot and give you the Safe Mode screen.

Choose Advanced Options for: Microsoft Windows Vista
Please select an option:

Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt

Enable Boot Logging
Enable low-resolution video (640x480)
Last Known Good Configuration (advanced)
Directory Services Restore Mode
Debugging Mode
Disable automatic restart on system failure
Disable Driver Signature Enforcement

Start Windows Normally

Description: Start Windows with only the core drivers and services. Use
when you cannot boot after installing a new device or driver.

Once you're done in Safe mode if you want to get back into Normal Windows restart the computer like you normally would and let it boot normally.

and how?