hello

1.  I use no torrent, no P2P.
2.  My genuine-licensed Windows is always up-to-date with all the necessary update patches being progressively installed at any given time.  Firewall on by default.
3.  My antivirus too is always up-to-date with frequent updates and is set to scan in background non-stop.  Also I keep abreast with all the current antivirus fixtools.

With the above three, there should be NO way any malware/spyware/torrent download or whatever continuously-bandwidth-intensive factor would slow down my streamyx connection.

Also, for most of the day my pc is the only one being connected to the Internet through our fixed phone line i.e. whenever my siblings go out with their laptop.  Still, can't even open such usually-simple-to-load websites (even during the busiest hours) like those of Gmail, Yahoo! Mail, and the likes, lately.  If that's not enough, more websites noticeably take longer than ever before to completely load in the browser.  

And, no need to tell me to check my physical connections.  Everything is firmly plugged and the telephone's tone is normal, indicating that the copper lines are in a good condition.

Also no need to tell me to check the indicator lamps on my modem.  More often than not the ADSL indicator is showing an OK and for every occurence of prolonged slowdown, I restart the modem as advised.

I believe many other users have similar usage conditions yet same problems like mine.

Would you still try to find faults on OUR side to put the blame on?  Worse still, (if you're from TMnet like what your nickname may imply) simply to avoid addressing weaknesses on the ISP's side?

So far so good :-)

For example I can stream youtube video at about 100+KB/s in the morning, but after 3pm only manage to get 10+KB/s, I even try to switch to other IP ranges but result still the same, same thing happens to download speed as well.

Your Youtube can work..... Mine totally "dead"!!! Even right now...