AVG update has made my computer inaccessible

Hello Hilary,
I am sorry to hear that you are unable to access your PC after updating AVG Internet Security unlimited. Please try to click on 'Advanced option' in start up of your PC and select 'Disable Malware protection on startup' option. Then please log into your PC. If you are unable to follow these steps, please get back to us and we will assist you further.
Thank you.

Issue resolved (https://support.avg.com/answers?id=906b0000000DpSWAA0).
Hilary, In future please try to keep the whole conversation in one question/thread to speed up any resolution. 
AVG Guru

I was using one of my computers  on Friday when a message came up from AVG, saying that an update had been installed.  It then said that Internet Security was not working and said I should restart the computer, which I did.  When the computer came back on again, it said Trying to do Automatic Repair, Your PC did not start correctly. ‘Press “Restart” to restart your PC, which can sometimes fix the problem.  You can also press “Advanced options” to try other options to repair your PC.’  I have restarted the computer several times and it just repeats the message about the Automatic Repair, which fails again and again.  I have also tried several of the other options but nothing has worked.  I cannot get into the computer.
 
I am sure that this problem has been caused by AVG.
 
Please give me some advice.
 
Thank you.
Hilary

I have tried the solution which Abirami gave me - going to advanced options and removing the 'Disable Malware protection on startup' option.  This worked but the problem happened again when I used 'restart' again.  Strangely the computer now works if I use 'shut down' and then reboot.  It seems as if the problem happens when I use 'restart' but not shut down.  What is the solution to this, please?

Issue resolved (https://support.avg.com/answers?id=906b0000000DpSWAA0).
Hilary, In future please try to keep the whole conversation in one question/thread to speed up any resolution. 
AVG Guru

Hilary,
I am glad to know that you have successfully logged into your PC. But I am sorry to hear that you are unable to use restart option in your PC. I have sent an email to get in touch with our additional technical support team. Please use the email and get connected with them. They will resolve the issue for you.
Thank you.

Hello Hilary,
I am sorry to hear that you are unable to access your PC after updating AVG Internet Security unlimited. Please try to click on 'Advanced option' in start up of your PC and select 'Disable Malware protection on startup' option. Then please log into your PC. If you are unable to follow these steps, please get back to us and we will assist you further.
Thank you.