Your outlets only have two-prongs
All outlets that do not have three-prongs should be immediately replaced. Besides preventing you from plugging-in three-prong appliances, two-prong outlets are ungrounded. This presents a significant and dangerous shock risk and puts your electronics at risk of permanent damage. Even using surge protection won’t help when you’re using an ungrounded electrical system. Your electrical panel must be rewired to provide the necessary ground to make older two-prong outlets safe.