After purchasing a notebook, many users are often dissatisfied with the pre-installed operating system. They like to reduce Windows Vista to Windows XP or Windows XP to Windows Vista. Because the notebook has some special features, users can easily encounter some problems after changing the operating system. Only after solving these problems can the changed operating system be used smoothly. The following small series explains some key points that need to be paid attention to when changing the notebook operating system. First, refresh the BIOS many brands notebooks pre-installed Windows Vista before the factory, by default does not support Windows XP, if users directly modify Windows XP, then there will be many problems, such as wireless network card search can not find wireless network, can not Normal shutdown, etc., some notebooks can not even directly install Windows XP. This is mainly caused by the incompatibility of the motherboard BIOS. We can solve the problem by flashing the BIOS. Take the HP DV272X series notebook as an example. Pre-installed Windows Vista models, BIOS is F.25 version, you must brush back to F.13 version, BIOS can use Windows XP smoothly. Log in to HP's official website and download the F.13 version. Before flashing the BIOS, it is recommended to install the battery first and then connect the power adapter to avoid accidental power failure. After everything is ready, log in to Windows Vista, run F.13, follow the prompts to enter the refresh interface, click the & nbspquo; YES & rdquo; button to refresh the BIOS, the notebook automatically shuts down after about 1 minute. After successfully flashing the BIOS, the notebook can be installed with Windows XP. Second, get SATA controller Some pre-installed Windows Vista notebooks support Windows XP, but users will find Windows XP when installing Windows XP, the notebook prompts can not find the hard drive. This is a problem caused by the fact that the Windows XP installation disk does not have an integrated SATA driver. The solution is to enter the BIOS settings, under “Advanced” IDE Configuration” set “SATA Native Mode" to “Compatible” or “Disable”, let the SATA controller become compatible mode. In other words, with the above settings, the SATA local mode is turned off, the hard disk is running in IDE mode, and the SATA controller is not detected when Windows XP is installed, and the user can install Windows XP. Since the SATA mode is changed to the compatibility mode, the hard disk needs a detection and adaptation process. Therefore, when installing Windows XP, there may be a prompt to refuse to format the hard disk. In this case, just press the Enter key and repeat 2 or 3 times. You can continue to install Windows XP. It should be noted that after installing Windows XP, you need to enter the BIOS setup again, open the SATA working mode (set to “Enable”, then enter Windows XP and manually install the SATA driver. 3. Solve the driver compatibility failure installation. After a good operating system, because the built-in driver of the operating system may have compatibility failures, users will find many problems when they use them, such as black screen when playing games, frequent network interruptions, etc. At this time, hardware-specific drivers need to be installed to solve the problem. We can go to the manufacturer's official website to download the relevant drivers. If the official website does not provide a dedicated driver, then we can install a generic driver developed by the chipset manufacturer. For example, if the notebook of the Centrino platform changes the operating system, the universal driver of the Intel Chipset Device Software motherboard chipset can be installed. By analogy, all related drivers such as video card, sound card, and network card can be installed. It is worth noting that some models may fail to install the driver after modifying the operating system, such as when installing the Intel wireless network card driver. The prompt is not compatible. At this time, you only need to force the installation. In addition, sometimes even if the hardware driver is installed, there will still be some problems. For example, after downgrading Windows Vista to Windows XP, the sound card and the microphone will not work properly. This is Because Windows XP does not recognize the HD bus, you need to install the HD Audio patch provided by Microsoft. Therefore, if you find that the driver does not conflict, but some functions of the notebook can not be used, you may wish to find the corresponding Microsoft or manufacturer website. Patch 4, upgrade configuration A lot of pre-installed Windows XP notebooks after conversion to Windows Vista, the running speed is very slow, and even there are fake crashes, playing game card machine and other failures, but the driver does not have any conflicts. This is due to problems caused by low hardware performance. To run Windows Vista Advanced Edition, the notebook configuration requires at least 1GHz processor, 1GB or more memory capacity, 128MB or more memory capacity, and 40GB hard disk capacity. Many old notebooks only come standard with 256MB memory. 20GB hard drive, to modify Windows Vista, it is recommended to at least upgrade the memory and hard drive, and choose to install Windows Vista Basic Edition. If you want to install Windows Vista Advanced, in order to ensure the speed, it is recommended to reduce the performance level of Windows Vista, and to shield various special functions and effects in the operating system, such as adjusting the operating system window interface to "performance" mode This can increase the running speed by 30%, and cancel the function modules such as defragmentation, shutdown of Windows Defender, and shutdown of system restore, which not only reduces the frequency of hard disk reading, but also saves hard disk storage space, thus allowing more resource allocation. Give the application software. 5. Retaining special features Brand notebooks have built-in various features, such as one-click recovery, fingerprint recognition, face recognition, battery saving, etc., but after modifying the operating system, these functions often fail. How to retain these functions? ? First let's talk about how to retain the one-click recovery feature. If you want to use the one-click recovery function for the new operating system, you need to re-partition the hard disk before installing the operating system and ensure that there are more than two partitions. After installing the operating system, go to the manufacturer's official website to download the one-click recovery program, and then install the one-click recovery program under the new operating system to get a one-click recovery function. It should be noted that most notebooks have multiple partitions, the first one is the system file, and the last one is the hidden partition, and the system recovery files are kept in the hidden partition. So neither the first partition nor the hidden partition can be formatted. The same method can also refer to one-click anti-virus, one-click audio and video, fingerprint recognition, battery saving and other functions. If you modify the operating system, use these functions will be faulty, it is recommended to enter the BIOS to close these modules (such as TMP chip) For better compatibility