HELP!

ok if anyone our there can help me.... somthing is up with our computer! it has been for awhile and my hubby and i keep accidentally figuring it out.... but this time we cant and we dont have anywhere to take it to here... i mean not where we would understand what theyre saying....
so the problem is its not always showing pictures on websites... sometimes if you refresh the screen enough it will.... but usually we have to turn off our virus blocker and then it will work.... but we dont want to do that.... so i'm thinking some settings got messed up... we thought java, cookies.... etc etc.... but we've messed with those before and it worked... although no matter what we've done we can't get the old navy website to work! ugh! so now the most frustrating thing is whatever this problem is , its blocking me from being able to upload photos to my blog or my etsy site! we've tried everything... so if anyone anywhere knows what to do then please help and then hopefully i can get this blog back on the road!