Please try to download AVG with different browser.
If it is still not possible download full installation file on another computer and move it to your on USB flash drive.
Full installation file can be found here:
I have been trying to download AVG 2011 anti-virus program and get error messages like this: C:\DOCUME~1\OWNER\LOCALS~1\Temp\xGh11+Gs.exe.part could not be saved, because the source file could not be read. I get the same type of message when I tried to get another free anti-virus as well. I have Windows XP and use Firefox. Can anyone tell me what's going on and what I should do?