Restore Point disk allocation

[johnf]

I have 2 drives, both partitioned, dual boot -
1. C: XP Pro + D: Data partition
2. E: Alternate OS + E: Data partition

As I have 20 restore points on C:, going back to July 25, I decided to
reduce the Restore Point drive allocation to drop of at least half of the
points.

Unfortunately, in System/System Restore, only D, E & F are currently
showing.

Previously I had used this method & C: appeared there then.

Does anyone know what's happened & how I can once again display my C:
partition?

--
Johnf