Ok, I've stopped the Windows Update Service and that didn't seem to increase the speed.

I also stopped the Superfetch service which I found to be the service associated with svchost.exe which was using about 80,000k, and upon stopping it, it had little to no effect on the speed. I also stopped Microsoft Windows Search Indexer which was below Google Chrome, taking about 27,000k in memory and this also had little to no effect.

With those services stopped, I open a tab in Google Chrome and CPU usage rises up to 100%, the tab loads, then CPU usage lowers back down to about 30%. The process using the highest memory is svchost.exe, which is Superfetch. Is Superfetch usually supposed to use up that much memory?

Anymore ideas about this issue?

(This is becoming more of an OS issue instead of a Sandboxie issue, but I will appreciate help either way.)

I don't suggest you to stop all services at once, because in this way you can't know for sure what is the responsible.

Why disabling Superfetch is a bad idea.
With SuperFetch Programs launch much quicker, and Windows boots faster. So if you disable it, you can impact negatively your performance.
If you have a hard disk, it is useful to keep it in most cases (except minor cases, displayed in the comments section of my previous link).

Did you try to disable Aero using Windows 7 basic theme?
In you first image there is a process called Desktop Window Manager (Aero) that is using actively your cpu.
Unfortunately in your images I can't see all running processes, but only a part of them.

Did you try to uninstall all programs that you don't currently use?
If necessary, I recommend you to follow also this useful guide (images are available for registered users).

Let me know.

Ok, I disabled Aero as you suggested and that unfortunately made little to no difference in the speed. I also don't have many programs on my machine considering this was a clean install of Windows 7 several weeks ago.

I am actually now trying to replace some corrupt files that sfc /scannow found, but couldn't fix itself. I've located a specific file in the CBS.log from the scan and the very first item that's corrupted, the line says this:

'Cannot repair member file [l:26{13}]"msdrm.dll.mui" of Microsoft-Windows-Rights-Management-Client-v1-API.Resources...'

I looked up the msdrm.dll.mui file. Here's a description of the file:

'msdrm.dll.mui is a system file and shared by several programs, which plays an important role in maintaining Windows operating system running smoothly.'

That last part seems relevant to the problem I'm having with the system running sluggishly so I'm considering replacing that specific file. However, I located the file in two different places on my computer, one in 'System32/en-US', and one in 'Windows\winsxs\amd64_microsoft-windows-r..nt-v1-api.resources_31bf3856ad364e35_6.1.7600.16385_en-us_8a24106bbbcd1bda'.

I'm wondering which one I should replace, and how should I go about replacing it/them?

I think you should replace msdrm.dll.mui in System32/en-US. Winsxs is a sort of backup folder used to store multiple dll versions.

Tro to follow this guide:
http://www.sevenforums.com/tutorials/42776-extract-files-windows-7-installation-dvd.html

If you don't have a Windows 7 DVD, you can try to use msdrm.dll.mui contained in winsxs for the replacement in System32/en-US.

Have you considered to do a system restore? It's easier and quick.

I did in fact do a restore but unfortunately it wasn't as early as I would have hoped. A cleaning of my computer eased the restore points and I was left with one that wasn't right. I'm going to try what you've suggested, and I'll come back with the results.