SBS server 2003 explorer states 1G C: drive and 1G free space

Hi there,

I have a SBS 2003 R2 server (installed on the C: Drive).
Recently the explorer states that the C: drive is 1G in size and has 1G free space.

When checking disk managment, it states the disk is 30G and has 23G free space (which is correct).

This problem however makes it impossible for me to install certain programs who need more than 1G free space (and checks this before installing).

Google resulted in 0 hits on this problem.

Did run CHKDSK /F/R, but no results.

Anyone any suggestions?

Regards, dikky