System Restore in Windows XP

System Restore in Windows XP is a process that saves the changes made on the system (system files and registry) by backups. Periodic of the computer state at time t .

System Restore provides a new chance to the user which delivered its unstable system giving the possibility of return to a previous state stable.

The monitored files are executable (. Exe,. Com and. Dll files) and drivers (. vxd and. sys). The complete list is available in the file% windir% \ system32 \ restore \ Filelist.xml , one finds the files included and those excluded. The system does not monitor files created by the user, so this is not a system backup as such.

Note: If you return to a previous state, your personal files are not deleted.

Periodic restore points are created when these opportunities:

All 10 hours running (it takes 2 minutes of inactivity) and at worst every 24 hours. If the computer is arrested more than 24 hours, the restore point is created computer startup.

When a program is installed by Windows Installer (files Msi eg Office 2000/XP, Highway 2001, Visio 2000, ...)

When a program is installed by InstallShield version 6.1 or higher.

When an update is installed with Windows update.

When installing an unsigned driver.

When restoring the integrated backup manager.

In normal operation, before restoring an earlier point (in case the old restore point does longer works).

Finally, we see that it is possible to create restore points manually.

These restore points are saved in files compressed on each partition or disk on which you have enabled System Restore.

They are in the folder:

\ system volume Information \ _Restore followed by a unique identifier,

for example:

(45EF8D47-5D10-87D7-4866-DA8A387DC2A2)

then in the subfolders:

RPxx (Restore Point).

The aim of this paper is not to go in detail in Operating System Restore, so I can go no further.

The place on the disk depends on the size of the volume on which Windows XP is installed. The following rules give you an idea of occupied spaces:

1.The minimum size of the bank storage is 200 megabytes. If the boot partition contains less than 200 MB of available space, System Restore is disabled by default and mustactivate it manually after freeing up disk space (using Wizard Disk Cleanup for example).

2.Below 50 MB, all restore points are deleted. If System Restore is disabled due to lack of space temporary disk, it automatically resets itself when it find enough disk space available.

3.On volumes that are larger than 4 gigabytes, the maximum size of the bank storage is 400 MB on the volume more than 4 GB, the size of the food bank is equal to 12% Of total space.

4.When all the allocated space is occupied by the principle of FIFO(First in, first out), restore points are the oldest erased to save the most recent. There is no calculation or approximation for the number of restore points,it depends on the number of software (applications and drivers) installed.

5.These spaces can be adjusted manually by right clicking on the desktop,properties, tab "System Restore".After selecting the volume, click on the "Settings" button.

6.Go to "Settings Restore system".

7.Set between 1% and 5% of disk space to use in order to avoid losing too much space on the hard disk.

System Restore in Windows XP

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