text: i have dsl connection, but lately my websurfing and downloading is very slow. why? i have tried defrag, spyware and adware removal programs (spybot, ad-aware) and i have deleted temporary internet files etc. i have also run my mcafee virus protection. maybe your isp is having problems, maybe you should contact them.  or, if you're on a contract and you have limited downloads, you might have used your monthly limit, and your speed has been dropped down.