StarTech.com StarView SV211K 2-port KVM Switch "removing malaware" Questions

Laptop going slow Laptop running slow, think its full of viruses, adware, spyware, ect, no memory, tryed cleaning it up, but starts, then stops, dont care about anything on it about 4 years ago, curry

my system is Compaq c700 window vista home with 1.5gb ram & 160 hdd.my system is runing very slow it many time getting hang , courrupted internet explorer,paint command algso getting hang ...