Having troubles with AVG?

i have been having so much trouble with AVG i have downloaded it 3 times, and it took a while for the download to work because of corrupted files. but now that its downloaded i try to install it and this comes up, " action failed for file AVGgmfx86.sys. Error 0x80070002." i have no clue what to do, i have done everything i can and have been up 48 hours trying to fix it. please help, because i am so frustrasted. : ' (