DSL...EXTREEEMLY slow

The problem mentioned below has been solved--{for now}
....I solved it by unplugging the modem power cord for 15-20 seconds
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.everything was goin just fine....then computer freezes...I shut down,restart, and it freezes again when I tried to open the second window.
it hasn't froze again but ever since the freeze my browser--{IE 6 using DSL}--has been extreeeemly slow----{2 to 3 times slower than dial-up even}
...Care to 'opine' ?? {What's causing this?}