Vista system that is mysteriously running low on disk space

You can reset the value of the Maximum Shadow Copy Storage space setting using the command:

vssadmin resize shadowstorage /for=<ForVolumeSpec> /on=<OnVolumeSpec> [/maxsize=<MaxSizeSpec>

On my problem system, I reset the Maximum Shadow Copy Storage space setting to 15GB using the command:

vssadmin resize shadowstorage /for=c: /on=c: /maxsize=15GB

Once the operation was complete, I restarted the system, and everything has been running normally since.

What's your take?

If you have a Vista system that is mysteriously running low on disk space, you might want to use the VSSAdmin command-line tool to investigate and change the Maximum Shadow Copy Storage space setting.