Cryptic can be tough...
Can you post a copy of the report AVG is showing?
Also, let's get some diagnostics, and then determine what strategy to pursue.
Please download GMER:
[This version will download a randomly named file (Recommended)]
Disconnect from the Internet and close all running programs.
Temporarily disable any real-time active protection so your security programs will not conflict with gmer's driver:
Double-click on the randomly named GMER file (i.e. n7gmo46c.exe)
Allow the gmer.sys driver to load if asked.
GMER opens to the Rootkit/Malware tab and performs an automatic quick scan when first run. (Please do not use the computer while the scan is in progress.)
If you receive a WARNING!!! about rootkit activity and are asked to fully scan your system...click NO
Now, click the >Scan< button.
If you see a rootkit warning window, click OK.
When the scan finishes, click 'Save...' button to save the scan results to your Desktop.
Save the file as >gmer.log<
Click the Copy button and Paste the results in your reply.
Note: Please, do not take action on any of the information on the GMER report!!
If you encounter any problems, try running GMER in Safe Mode:[http://www.computerhope.com/issues/chsafe.htm]
If GMER crashes or keeps resulting in a BSODs, uncheck 'Devices' (on the right side) before scanning.
Next, please download >mbr.exe<
Save the file to your Desktop.
Double-click >mbr.exe< and follow the prompts.
When mbr.exe is done, it creates a log.
Also copy and paste contents of the mbr.exe log in your reply.