I can't to clone my HDD because some services are missing.
I know that SOME services can be restored by running a suitable reg file.
Where can I get the reg files for the following services :
1. MS Software Shadow Copy Provider
2. COM+ System Application
3. COM+ Event System
4. System Event Notification.

How else could these services be restored ?

Open services.msc (Start, Run, type in services.msc, or, it's at C:\WINDOWS\system32\services.msc). Check through there for your missing/disabled services.

If you need further help/info, post back with what you require.

Restoring missing Services in WinXP Home
I can't to clone my HDD because some services are missing.

With what backup software are you attempting to "Clone" your Hard Drive" with?

Give more detail about how you know "some services are missing" please?

Perhaps my thread at the bottom of this post Backup Backup Backup may assist you.

kind regards,