MySQL error 1036: table is read only

Question

When im trying to insert a record to the table using phpmyadmin it gives me

#1036 - Table \'sch_portfolio\' is read only 

I saw in some art

Answer 1

I suspect that in my case, this was caused by a hidden anti malware antivirus Bytefence (probably, it was bundled with something else). The problem was gone after uninstalling this antivirus.