Problem unstalling my avg

hallo,
I recently installed avg protection free trial to my computer. two days upon using it, it developed a problem that has ever persisted since then. I have tried to unstall it but every time I do that, it gives me unstallation error. for instane, the last time i tried to unstall it, it developed an installation error OxC0070643.
please asist me to solve that problem

Hello Geoffrey,
We are sorry for the difficulties you are currently experiencing.
To uninstall AVG from your pc, we request you to run AVG remover tool.
To run AVG remover tool follow the below steps :
Please click on the below link to download remover tool
http://aa-download.avg.com/filedir/util/AVG_Remover.exe
Accept the license agreement and then choose AVG Product and remove it.
NOTE: Once the AVG Remover Tool has done with its process. Please go to the drive where you installed this tool and look for a folder named as "AVG Remover" and I request you to delete it manually.
Feel free to contact us for any further assistance. Thank you.

Hello Geoffrey,
We are sorry for the difficulties you are currently experiencing.
To uninstall AVG from your pc, we request you to run AVG remover tool.
To run AVG remover tool follow the below steps :
Please click on the below link to download remover tool
http://aa-download.avg.com/filedir/util/AVG_Remover.exe
Accept the license agreement and then choose AVG Product and remove it.
NOTE: Once the AVG Remover Tool has done with its process. Please go to the drive where you installed this tool and look for a folder named as "AVG Remover" and I request you to delete it manually.
Feel free to contact us for any further assistance. Thank you.