I came across a Fix Tool that when installed in a VM it auto makes a reg backup at around 32 meg then stops.

If I install it through Sandboxie it continually makes reg backups till all hard drive space is used up.

hxxp://www.fix-tool.com/

Can cause probs with windows freezing so a vm is advised?

When is done a reg backup sandboxed comes out the known issue: looping (with the sandboxie key).

Thus you can't use app. (sandboxed) that needs to do .reg snapshots, like RegShot, ZSoft Uninstaller, etc..

This was the reason why is useful to use SandboxDiff to read the before/after changes in Sandboxie'hives.

If your app has the ability to exclude registry keys, you can try to exclude all HKEY_USERS\Sandbox* branches. Doing this, I've been successful getting RegShot to run sandboxed.

Tried again. I did like wraithdu tip; added that key in RegShot'exclude registry keys. No luck... Looping comes out and I need to close RegShot. Not a big deal indeed - I think that Sandbox virtualization requires that behavior.