Drain on Computer Resources

AVG upgraded my AVG protection software today and the new program started using substantial resources (1/4 of total memory, >50% of CPU) and slowing down my computer (rather old and using Windows 7). I tried repairing the program using uninstall and restarting my computer but saw no improvement. I might have to uninstall AVG and look for another anti-virus software program if I cannot resolve the problem.

Hello, Stuart

We apologize for the inconvenience caused.
This isn't the usual behavior of AVG program. Let us work towards fixing the issue.
Can you confirm that there is no other security application installed in your PC?
Having multiple security application will conflict.