The life-saving straw after Windows XP crashes

In-situ upgrade 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, solving many serious problems. System problem.

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.

Symptom: A rookie friend called and said that the Windows XP system could not be started. He rushed to find that he automatically restarted each time he started the scroll bar interface. Asked for details, it was installed yesterday. A lot of software, 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.

However, 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, then press F8 to accept the installation agreement, then the installation program will detect that the system has been installed Windows XP, and give a prompt, then press R to choose to repair the 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 you have a dual system installed on your computer, you can also upgrade Windows XP in-place on other operating systems that work properly by inserting the Windows XP CD-ROM into your CD-ROM drive. In the "Installer" 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, in-situ upgrade for medical treatment of "cases"

In-situ upgrade is not "all over the disease", it has a suitable application, in addition to the examples we have seen above, if you encounter The following problems can also be solved by in-place upgrade:

The problem of starting Windows XP in safe mode is not possible.

Caused by a recently installed system update (Windows Update, hotfix, 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.

III. Precautions during in-situ upgrade installation

Windows XP's in-place installation does not cover it like Windows 98. It will make a lot of changes to the system, so it is used. Before installing in situ, we must first determine if in-situ installation should be used.

1. If your Windows XP is pre-installed on a branded machine and there is an "Undo_guimode.txt" file in the Windows\\System32 folder, you may get lost the start menu when using the in-place upgrade installation. Shortcuts, startup group data, and problems with shared document data. In this case, 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 has also been changed. By default, you need to re-personalize.

3. After the in-place upgrade installation, all patches that use 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" in the i386 directory of the Windows 2003 installation CD. Copy the "Ntdetect.com" file to the original file under C:\\.

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 this is the case, 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 to find [HKEY_LOCAL_MACHINE \\ SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E96A-E325-11CE-BFC1-08002BE10318}\\0001], create a new DWORD type key value "ResetErrorCountersOnSuccess" and set its value to "l".

Then modify the key value setting under [HKEY_LOCAL_MACHINE\\SYSTEM \\CurrentControlSet\\Control\\Class\\{4D36E96A-E325-11CE-BFC1-08002BE10318}\\0002] under the same key.

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 the home version, you cannot Use the Professional Edition for in-place upgrade installation.