Here are steps to create space for snapshots on the Windows 7 machine.
1. Stop AppAssure Agent Service.
2. If the machine has a System Reserved Partition (SRP), please assign it a drive letter in "Disk Management," say drive B:.
3. Identify all the volumes that you are protecting (backing up), say B:, C: and D:.
4. Open an elevated COMMAND prompt.
5. Type the following commands for each drive letter:
vssadmin resize shadowstorage /for=<EachVol>: /on=<SameVol>: /maxsize=320
For example, for B:
vssadmin resize shadowstorage /for=B: /on=B: /maxsize=320
6. Then type the following also for SRP partition (in this case B:) only - ignore if you no SRP:
vssadmin resize shadowstorage /for=B: /on=C: /maxsize=unbounded
7. Then for each of the remaining drive letters (being protected on the Core):
vssadmin resize shadowstorage /for=<EachVol>: /on=<SameVol>: /maxsize=unbounded
For example, for C:
vssadmin resize shadowstorage /for=C: /on=C: /maxsize=unbounded
8. Open volume B: in "My Computer" and then search for the "System Volume Information folder".
Note: If needed, change the folder options so that you can view hidden files, folders, and drives and hidden protected system folders.
9. Right-click the "System Volume Information" folder, and select Properties.
10. On the Security tab, click Edit, and then add "Everyone group" with FULL control to the folder.
11. Start AppAssure Agent Service and resume protection of the Agent on the Core Console and force a snapshot.