Actually there are several methods to backup Windows registry. Some of them, I’m discussing in this article.

Method 1: Using System Restore

When we create a system restore point in Windows XP, it backs up the following items:

• Registry
• DllCache
• Local User Profile
• COM+ and WMI databases
• IIS Metabase

So if you want to backup the registry, creating a restore point is the safest way to do so. To create a restore point go to Start –> All Programs –> Accessories –> System Tools –> System Restore. Create a system restore point from there.

Medhod 2: Backing up Individual registry keys

If you want to backup individual registry keys, go to Start –> Run –> regedit
This will open the registry editor. Go to the registry you want to backup, right click it and select Export.

Method 3: Backing up the whole registry

To backup the whole registry, go to Start –> Run –> regedit
This will open the registry editor. Go to File –> Export. This will open the save registry dialog. After the name, select “All” from Export Range and save the registry.

Method 4: Using NTBackup utility

Using the Windows backup utility, we can save the system state including the registry and all the files and folders we wish to backup. To use the Windows backup utility, go to Start –> Run –> ntbackup.
This will open the backup utility. Start the backup Wizard and select “Only select system state data”
If you want to backup the whole system, the select “Backup everything on this computer”

Method 5: Using command line

To backup the registry from the command line, use the following commands:
REG EXPORT KeyName FileName
Keyname    ROOTKEY\SubKey (local machine only)
ROOTKEY  [ HKLM | HKCU | HKCR | HKU | HKCC ]
SubKey   The full name of a registry key under the selected ROOTKEY
FileName   The name of the disk file to export
Examples:
REG EXPORT HKLM\Software\MyCo\MyApp AppBkUp.reg
Exports all subkeys and values of the key MyApp to the file AppBkUp.reg

Method 6: Using ERUNT automatic backup

ERUNT is a backup utility which can automatically backup the registry. It can be downloaded from here:
  Download ERUNT (772.8 KiB)

This method is very old but still usable for dial-up internet users.

Use the below method to resume internet connection while LogOff / Fast User Switching,

Start -> Run then type regedit and press enter

Locate the following entry,

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Right-click within the right pane, select New and then select String Value, and give name as

KeepRasConnections

and press enter, then double click on KeepRasConnections and set the value to 1. Close the Registry Editer and restart your PC. Now, your dial-up internet connection will resume after LogOff / Fast User Switching.

• After checking your version of Windows Vista, go to “Start” and “Control Panel.”
• Click on “Programs” and then click the “Turn Windows Features On or Off” link.
• Click the “Plus” to expand the Internet Information Services file. There will be several options listed under the IIS file. You should look through each option and select each box for the options you want to add. By selecting the option a check mark will appear in the box beside the option.
• Once you have selected the options appropriate to your needs, click “OK.” A separate window will then open stating the features are being configured. When it is finished IIS will be installed and ready for coding.
• To see your webpage, simply open your web browser and type in the address :http://localhost/