I have internet but i can't open anything I downloaded?

there few possibilities want start @ beginning. telling check internet want start provider. possible provider has limited amount of data can accessed @ given time, , while web pages take little data displayed onto screen, downloads quite bit of data , can demand large amount of bandwidth. see if limit bandwidth or not allow service used downloading items exceed size.
if appear not causing issue next step computers security , browsing capabilities. if computer has security system active may set prevent being loaded computer. downloading item different process browsing web, , requires more actions pc. there firewall installed , prevents data entering computers ports , prevent downloading.
problem within browser. every browser has section able bit of customization. have small security measures available designed keep computer safe while surfing web. sure browser allowing content downloaded , has download manager can handle transfer of data web pc.
leave 2 more scenarios , first 1 see if computer has parental controls setup , enabled. parents can prevent things downloads ensure kids don't end loading virus accident because didn't know accepting. can user accounts on windows , sure have privledge needed load new software.

i have telus internet. have internet , can surf internet. when download software says "please check internet" or "please try again". have d-link modem , vista computer.

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