i want to create a restore point in vista
and also tell how to enable it through group policy
where i will get the group policy option

Um, not really sure how the GP Manger relates to the System Protection Manger, which handles Restore-Point creation. Can you take a little more time to clearly explain what you are actually hoping to achieve?

You must be getting this message

Restore point creation disabled by Group Policy

Follow below steps and its gonna work for you

Using the Group Policy Editor

If your edition of Windows Vista includes the Group Policy Editor snap-in (gpedit.msc), follow these steps:

1. Click Start, type gpedit.msc and press ENTER

2. Go to the following branch:
Computer Configuration | Administrative Templates | System | System Restore

3. Double-click Turn off Configuration and set it to Not configured.

Note: If the above setting is already set to Not configured, set it to Enabled and click Apply. Then revert back the setting to Not configured, and click Apply, OK.

4. Exit the Group Policy Editor.

Let me know if the issue is resolved !

once i have created restore point now it shows me automatic update when i click on it
now how to create a new restore point
the gpedit.msc is not opening as i have vista home os