AVG AntiVirus FREE is using upwards of 90% of Disk

Hello Talon,

We apologize for the inconvenience. This isn't the usual behaviour of AVG Antivirus Free.
Initially, please check & let us know if you have any other antivirus program installed in your computer. As using multiple antivirus programs in a single computer can cause conflict between them.
Awaiting your response.

I've got AVG Antivirus FREE installed on my Windows 10 PC, and at seemingly random intervals it will begin using obscene amounts of disk memory. While it's doing so, the entire system bogs down and becomes practically unusable.

Hello Talon,

We apologize for the inconvenience. This isn't the usual behaviour of AVG Antivirus Free.
Initially, please check & let us know if you have any other antivirus program installed in your computer. As using multiple antivirus programs in a single computer can cause conflict between them.
Awaiting your response.

Thank you for writing back to us, Talon.

In this case, we'd request you to remove all traces of AVG Antivirus Free from your computer using our 'Clear' tool, restart your computer once and then reinstall it.
Please check if the issue still persists after the clear reinstallation.
Keep us updated.