Mikael,
We do understand your concern, do not worry, you can skip the defragmentation by the following steps. In AVG PC Tuneup program, under maintenance components, click on settings icon which is at the bottom right corner of that feature. It will open a maintenance settings where you can disable your defragmentation option. Please, feel free to let us know if you require any further assistance. Thank you.
My PC has SSD.
According to this wiki Wear leveling - Wikipedia
is it not a good idea to defrag SSD's because it is shortening the life-time of the "drive".
How do I eliminate defragmentation in Quick-Tune?
Mikael,
We do understand your concern, do not worry, you can skip the defragmentation by the following steps. In AVG PC Tuneup program, under maintenance components, click on settings icon which is at the bottom right corner of that feature. It will open a maintenance settings where you can disable your defragmentation option. Please, feel free to let us know if you require any further assistance. Thank you.