Everytime I try to install AVG anit-virus 2011, I get an error message saying that it can not install AVG watchdog and that I should make sure I have administrator access. I am log in as administrator and still I get the same error. I tried turing off all other security features and still it will not work. The error code I get is 0xC0070643. I am in no means an IT guy, so please can someone help me?

The same thing happended to me and I installed the AVG tune up because it worked on my Mac with WIndows. IT still will not let me install. I can not find out any one that can help me. ____

Have got the same problem. AVG unpacks, but then tells me it cannot find Drive C: - which is no wonder because I changed drive-letters for another technical problem which I had earlier. Problem with download now is: Even when using not the automatic installation method but the user-defined method, the installer does not give me the chance to change driveletter for installation to H: (where I got my programmes). Please help with info

Check whether you have properly cleaned out your previous Antivirus on your PC. Norton & McAfee leave tons of registry items that will not allow any other AV to run properly.