Well everyone, while I want to restrain myself from jumping to any conclusions, there appears to be a sign for tempered optimism, at least on the dbliw.sys front (still not sure what to think about the C:\Users\Zach\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\UYPMOKHT\Mojo_2.2.1[1].exe file):
I decided to run another boot-time avast! scan, on the extremely unlikely chance that this time around, it would find dbliw.sys and succeed in quarantining it. Wouldn't you know it, it just might have worked! The file was found during the scan and I tried to move it to the chest, thinking I was setting myself up for another disappointment. However, I ran malwarebytes' and avast scans when the computer was rebooted, and neither found any infected items. I took a look through my avast! Virus chest, and low and behold, there is dbliw.sys in the infected files list.

one addendum: dbliw is still on the list of non-plug and play drivers in the Device Manager. What do you guys think, should I try uninstalling it again, now that I have dbliw.sys in the virus chest?
Essexboy: What steps do I still need to take? Is there a way I can check to make sure my system is clear? Re-run OTL perhaps?
I'm trying to hold back here, but maybe-- just maybe-- we're getting somewhere finally, and from the most unlikely of sources to boot, one I thought I had already exhausted!
I'll post an update on the situation early in the afternoon (USA East Coast Time).