I have the same problem it takes 2 to 5 mins for my word to be useable, have you tried contacting Symatec it's hopeless.
It also bins all my e-mails even on the lowest setting have had to disable internet security.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?