I need help

[AC Question]

i have a HTC desire 510 and everytime i try to doanload an app on google play store a message will pop up and it will say unknown error code -24 or unknown error code 961.this is really pissing me off but it only do it on certain apps like Snapchat,Retrica,and instagram.i have already tried the hold down power button and vol down thing..it didnt work i also tried clearing the cache...can someone please help me

 

[dpham00]

Have you tried to backup all data and do a factory data reset?