Hello Tommy,
Here are some possible reasons why you may have some missing restore points in this link to Microsoft.
System Restore "restore points" are missing or deleted
Hope this helps,
Shawn

Quote: Originally Posted by
Tommy Tillman
Hi Gang!
I have Windows Vista Ultimate SP1 on my home PC. I recently noticed some
odd behavior.
I used to have at least 10 restore points in my System Restore. But
yesterday I noticed that it now only had 4 restore points!
I have 2 Hard Drives - C is set to allow 20 gigs for restore points (and
shadow copies) and the D drive is set to about 60 gigs for restore points
(and shadow copies). The C drive is 160 Megs total and the D drive is 500
Megs.
So that would be about 5 gigs per restore point (20/4)? Or is there
something else going on?
I noticed that ALL my files appear to have shadow copies.... why? I looked
at my D: drive... that is where I store my music and pictures... and there
appear to be many shadow copies of the pictures... even though I have not
changed them in any way!
Can all this be a side effect of some other program making it appear that
the files have been changed... then shadow copy service says... "make a
copy!!".. and then I run out of storage space for the copies on C and D
causing the system restores to kick out the older restore points to make
room? I am thinking along the lines of virus checkers... spyware
checkers....
What do you think???
--
Tommy Tillman
A+ Network+ MCP