VMFusion 7 Upgrade -- Performance Issues

I've got a late 2011 15" MBP with 4mg RAM.
I'm in the trial period for an upgrade from, I think, VM Fusion 4 to VM Fusion 7. I don't really have an option on whether to upgrade (unless I want to switch to Parallels) because VM 4 wont work with Yosemite.

But I've noticed that the performance on my VM has really slowed down. And I only run Quicken on the VM.

Any suggestions for how to tweak the set-up? I don't really know anything about how to use Fusion, other than opening it and shutting it down. I can't seem to find any basis set-up help on VM's website, but it's possible I'm just not looking in the right place.

Oh -- This may be a windows question, but:

When I open Windows 7 in Fusion, I get the following error message and my desktop apps do not appear:

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I'm logged in as the Admin. I've checked everything I can find for privacy settings and permissions, but I can't seem to get rid of this or get my Desktop icons back. Any thoughts?