hi can anyone help me i bought about 3 yrs ago a acer aspire 1642 laptop and i have a problem with the wlan. it does not matter to which wifi service i connect to my connection speed will drop . it starts of at 54 mbps and after a minute or 2 will drop down to about 1mbps. often it will float around 5.5 and then 11 and then 1 etc etc etc . im getting fed up now lol please help

hi can anyone help me i bought about 3 yrs ago a acer aspire 1642 laptop and i have a problem with the wlan. it does not matter to which wifi service i connect to my connection speed will drop . it starts of at 54 mbps and after a minute or 2 will drop down to about 1mbps. often it will float around 5.5 and then 11 and then 1 etc etc etc . im getting fed up now lol please help