In-situ upgrade to save XP crashing straw

        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, Windows XP also has a similar cover installation feature, which is called in-place upgrade, also known as a repair installation, the same case can reinstall the system without losing existing data systems to address the many serious System problem.

a situ and in situ upgrading example

Windows XP upgrade coverage than using Windows 98 installation will take some work, let's look at how to do this through an example.

Symptom: a rookie friends called and said Windows XP system will not boot up, hurried, just started to find each scroll bar interface automatically restart, ask the details, saying it was install uninstall 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.

But friends say the system partition to back up important data yet, so he tried it in-place upgrade, very successfully solved the problem.

specific steps: First, use the Windows XP installation disc to start the computer, follow the prompts to press the "Enter" key to start the installation of Windows XP, and then press F8 to accept the agreement to install, then the installer detects 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 your computer has dual systems installed, you can also upgrade Windows XP in the other normal operating system by inserting the Windows XP installation CD into the CD-ROM drive, "Welcome to Windows." 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, the in-place upgrade for treatment of "cases"

place upgrade is not a "cure-all", it has a suitable application, in addition to the examples we saw above, If you encounter the following problems, you can also solve it by in-place upgrade:

★ You cannot 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 change

★ file system, and we want to revert back to the original state, Windows XP system applications need to install the default (file and registry) permissions.

★ You need to use the Windows installer to find Plug and Play devices again.

Third, pay attention

Windows XP situ installation of in-place upgrade installation like Windows 98 did not cover what you can, it will be a lot of changes to the system, so use 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 a missing 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 installing the upgrade in situ repair Windows XP, although applications without reloading, but many system settings are restored to the default state, such as System Restore automatically open the login interface has also been changed By 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" 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 5.1.2600.2055), replace the original file in the system, and open the registry editor, 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 press the same method to modify the key is set to [HKEY_LOCAL_MacHINE \\ SYSTEM \\ CurrentControlSet \\ Control \\ Class \\ {4D36E96A-E325-11CE-BFC1-08002BE10318} \\ 0002] the primary key.

6. place upgrade requires installation of the system consistent with the original version of Windows XP, for example, turned out to be a professional version, must be carried out in-place upgrade with Windows XP Professional Edition, and if the original is the home version, you can not Use the Professional Edition for in-place upgrade installation