"Missing %HS..." have tried known methods with no luck--help please?

"Missing %HS..." have tried known methods with no luck--help please?

Hiiii..*siiigh*
I have been trying to fix this for hours, days.
General info, I have Windows 7 64 bit on a Toshiba Satellite laptop.
I have AVG and have determined it to be the cause...I know it was an old AVG update but I picked it up unknowingly from a torrent site, so it's a new problem to me. YaYY.
I can't get into Windows---just the colored bits of light making the Window, then an endless cycling of Windows Repair...No F8 options procur a different result.

I have tried running the AVG Rescue USB following with recommended procedures..I tried scanning, the Utilities/File Manager...renaming first, then going over and deleting practically any and all AVG files I could find in various sda1/2 sdb1/2 drives...

I tried removing my hard drive and connecting it to an external docking thing and opening it up on a different machine, and renaming or deleting files from there..

Then after each have tried Windows Repair, Last Known Good Configuration...

And still, the endless cycle of Windows Repair.

I tried updating AVG from an internet connection I obtained from an ethernet cable, and it seeemed to have done something like confirmedly connect and update, but YET... same same.

I'm not completely tech-knowledgeable but I am fairly clever at resolving problems myself with the aid of the internet and perseverence, but I haven't encounteed this level of stumped and dejectedness over such a stubborn issue before.

I would realllyy sincerely appreciate it if anyone might take the time to walk me through a resolution.

There is no way to know what changes you made to the system.

Perform "System Recovery" to factory state.

Instead of using AVG, I recommend you use:

http://windows.microsoft.com/en-US/windows/products/security-essentials

And Windows Firewall

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