A lot of the errors involve your Norton/Symantec products, although some point to a program called Mirror Folders while others point to your USB drivers and other system files. Just because an error occurs in memory doesn't mean that it's a memory problem (although it is a possibility). Your running of the Windows Memory Diagnostic makes it unlikely that this is a memory issue.
To start, perform a couple of free, online scans from the links here:
http://www.bleepingcomputer.com/blogs/usas...?showentry=1252 This'll let us know if your Norton/Symantec procducts have been corrupted by malware.
If you come up clean in the scans, use the Norton Removal Tool to remove all traces of the Norton/Symantec programs. Here's a link to the tool:
http://service1.symantec.com/Support/tsgen...005033108162039I'd also remove the Mirror Folders program - but that's just a guess on my part.
Finally, due to the number of reports tha involve your USB drivers, I'd check to ensure that all your USB devices are operating properly. If you can't check them, then disconnect them until you're done testing. Beyond that, you can reinstall the USB drivers by reinstalling your motherboard/chipset drivers.