You cannot just rename a .jpg to .bmp . You need to use an image editor.
Do you have a different size requirement for a different brand? Let me know in the comments below. Disclaimer: Modifying system files requires administrator privileges. Always back up your data before making system changes. lenovo oem logo bmp 120x120
The Ultimate Guide to the Lenovo OEM Logo: Why It Must Be a 120x120 BMP You cannot just rename a