In-place upgrades may be a strange concept for many people, but I believe everyone knows about the installation. In the case of serious problems with Windows 98, when you need to reinstall the system, in order to avoid formatting and destroying the software and data already installed in the system, we usually use the method of directly overwriting the installation.
In fact, there is a similar installation function in Windows XP. It is called in-situ upgrade, also known as repair installation. It can also reinstall the system without losing the existing data of the system and solve many serious system problems. .
I. In-situ upgrade method and example
Windows XP's in-place upgrade is more troublesome than Windows 98's overlay installation. Let's take a look at the specific operation method through an example.
Fault phenomenon: A rookie friend called and said that the Windows XP system could not be started. He rushed to find that he automatically restarted every time he started the scroll bar interface. Asked for details, it was installed and uninstalled many software yesterday. There has been no restart in the middle. This phenomenon has appeared on the boot today. The inference may be due to the destruction of the system when installing and uninstalling the software. The last time the correct configuration failed to start properly, the safe mode could not be entered. It seems that only the system is reinstalled.
But my friend said that important data in the system partition has not been backed up, so I tried the in-place upgrade and solved the problem very smoothly.
Specific steps: First use the Windows XP installation CD to start the computer, press the "Enter" button to start installing Windows XP, and then press the F8 key to accept the installation agreement, then the installation program will detect that Windows XP is already installed in the system. And give a prompt, then press the R button to select the repair installation, the rest of the steps are exactly the same as the normal installation of Windows XP. However, please note that after you upgrade your Windows XP with an in-place upgrade, you need to reactivate Windows XP.
If your computer has dual systems installed, you can also upgrade Windows XP in-home under other normal operating systems by putting the Windows XP installation CD into the CD-ROM drive and "Welcome to the Windows Installer" In the interface, click the "Installation Type" drop-down box to select the "Upgrade (Recommended)" option, and then click the "Next" button to continue the normal installation.
Second, the in-situ upgrade is suitable for the treatment of "cases"
In-situ upgrade is not "all over the disease", it has suitable applications, in addition to the examples we have seen above, if you encounter the following These problems can also be solved by in-place upgrade:
★ Unable to start Windows XP in safe mode.
★ Caused by a recently installed system update (Windows Update, Fix, Windows XP Service Pack, or Microsoft Internet Explorer update), and cannot be resolved in any other way. The most typical case is that some users have used the cracked version of Windows XP and cannot be used after automatic update.
★ Registry issues that cannot be resolved by using other tools (such as "System Restore").
★ Some properties of the system file change, and we want to restore to the initial state, you need to apply the default (file and registry) permissions to the installed Windows XP system.
★ You need to use the Windows installer to find Plug and Play devices again.
Third, in-situ upgrade installation precautions
Windows XP in-situ installation is not as close as Windows 98, it will make a lot of changes to the system, so before using in-situ installation, we Be sure to determine if you should use in-place installation.
1. If your Windows XP is pre-installed on the brand machine and there is an "Undo_guimode.txt" file in the WindowsSystem32 folder, you may get lost start menu shortcuts, startup groups when using the in-place upgrade installation. Data and problems with shared document data, you need to delete the "Undo_guimode.txt" file before performing an in-place upgrade to avoid data loss.
2. After repairing Windows XP with in-place upgrade installation, although the application software does not need to be reinstalled, many system settings are restored to the default state, such as automatically opening the system restore, the login interface is also changed to the system default. You need to re-personalize.
3. After the in-place upgrade installation, all the patches that are used by Windows Update will be lost, so you need to re-update online.
4. If your computer also has Windows 2003 installed, after using Windows XP to repair Windows XP, Windows 2003 will not be able to enter. The repair method is to use the "ntldr" and "" under the i386 directory of the Windows 2003 installation CD. Copy the Ntdetect.com file to C: to overwrite the original file.
5. After using Windows XP to repair Windows XP, if you find that the system running speed is obviously slow, you can check whether the operating mode of the hard disk and CD-ROM drive is set to "PIO only" mode in Device Manager. If so , you need to extract the "Atapi.sys" file in Windows XP SP2 Beta (version number is 5.1.2600.2055), replace the original file in the system, and open the registry editor, find [HKEY_LOCAL_MacHINESYSTEMCurrentControlSetControlClass{4D36E96A-E325 -11CE-BFC1-08002BE10318}001], create a new DWord type key value "ResetErrorCountersOnSuccess" and set its value to "l".
Then modify the key value setting under the [HKEY_LOCAL_MacHINESYSTEMCurrentControlSetControlClass{4D36E96A-E325-11CE-BFC1-08002BE10318}002] primary key in the same way.
6. In-situ upgrade requires the use of Windows XP version consistent with the original installation system. For example, it is a professional version. You must use the professional version of Windows XP for in-place upgrade. If it is a home version, you cannot use the professional version. To perform an in-place upgrade installation.