AVG itself infected with virus?

The sze of AVG Internet secuity increse daily basis. Once itreched upt o 4 GB .Then I re insltted and resolved. I am using AVG for more than 7 yers..It happned many times in recent yers, Now it is occuring in a frequent manner and creting system delay and nuisance. Today it is showing 1.05 GB . last week i reinstalled and brought to some 350 MB. Seems anti virus software is affected by virus itself.
Hello Maria,

This isn't the expected behavior.
We would like to check the messages that are appearing and proceed further on this matter.
Provide the screenshot of the popups that you get for AVG here.
You can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
Do you mean that, you aren't able to access the interface of AVG PC TuneUp?
If not, could you be specific about the issue that you are experiencing with PC TuneUp?
I have numerous problems with AVG, Windows Defender has found threats with AVG antivirus and AVG constantly pops up with large pages that take up the entire screen so I effectively cannot use my computer,, what is going on? AVG PC Tune up doesn't work either. 
Hello Maria,

This isn't the expected behavior.
We would like to check the messages that are appearing and proceed further on this matter.
Provide the screenshot of the popups that you get for AVG here.
You can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
Do you mean that, you aren't able to access the interface of AVG PC TuneUp?
If not, could you be specific about the issue that you are experiencing with PC TuneUp?
Hi Asok,

This is not an expected behavior.

AVG Internet security requires a free disk space of 2GB.

However, the size of the program shouldn't increase after the installation. So, let us perform a fresh installation with our tools and check for the issue again.

Please use this link to download the remover tool http://download.avg.com/filedir/util/AVG_Remover.exe

Run the file and click on run any way, if it doesn't show any products.

For AVG Clear tool, use this link https://www.avg.com/en-us/download-thank-you.php?product=REM

Run the file and when you get AVG clear window loading, you will get a prompt with Yes and No option. Click on "No" and then select "Uninstall" to proceed with the removal.

Restart the PC when the prompt appears and then install AVG Internet security.

Let us know, the status of the issue.