What can make your IE connection slower than usual
# Over loaded PC : You might have too many programs installed in your PC and might be left with very less hard disk space. These programmes slowdown windows which might had affected your internet speed too. So just keep programmes you need and uninstall the rest.
# Intruders : Most of the times this becomes the main reason for a hog in network speed. viruses, Trojans, worms, spyware, and adware might had crept into your PC. Try scanning it with some antivirus and anti spyware or you can try some online scanner like this if you don't have one.
# Browser problems : You browser software might be giving you problem.Sometimes addons that you install in your browser eat up speed when you start your browser like live bokmarks or you might had installed some problematic add on.Here is the list of addons that are problematic with Firefox.
h**p://kb.mozillazine.org/Problematic_extensions(replce ** with tt)
# Startup : There will be some processes which might be getting started from the startup and decreasing the performance of PC.Find out the stray one and delete it from startup.
# Ping : Sometimes my PC forgets to connect if i leave it idle for long time and when I connect it again it gets a bit slow.Try to keep continuous ping on your internet ISP server.It keeps you connected. E.g if your server ip is 10.10.11.20 . go to run and type ping -t 10.10.11.20.Most of the net speed boosters integrate this tool in them.I recommend you to use network tweaking softwares to change your network settings for getting better speeds.
Try using disk cleaner softwares to cleanup junk on your hard disk and keep your PC clean.scan it for spyware and viruses.You net connection will be back with high speed as usual unless the service provider has some issues.I hope this will help you a bit