Please provide us with AVG installation logs - upload them to a favorite online storage and provide us with link.
This MSI error is global and has no exact culprit stored in it. That's we need the log to find the error line in.
I have an HP/Compaq nc6000 Laptop with Windows XP operating system with Service Pack 2.
At that time I had AVG Free which always seemed to work fine until I clicked on an add on the right side of the page and apparently opened the door for a virus. A friend loaded a different Malware program which I ran over and over until I thought I had it taken care of but apparently it deleted something that was needed to complete the Installation because almost at the end of the Install it comes up with the following Error Code and Error Message.
Error Code: 0xC0070643
Error Message: General Internal Error
Additional Message: MSI Engine: Failed to Install the Product.
Context: AVG Product Installation