What could slow down Upload speed on ADSL2?

Hi X-perts,

I have ADSL2 connection (20000/1000). When testing speed via different speed testers on two PCs (one Win7 and another is Win XP), it shows me identical numbers for DL speed and too different bandwidths for Uploads:

Win 7: UL ~ 800 kbps
Win XP: UL ~ 300 kbps

speedtest.net and ozspeedtest.com:
Almost identical results for DL and UL on both PCs

What could slow down UL speed on Win XP for myspeed.visualware.com:? I tried disabling firewall and antivirus, but is still the same.

Please, advise.

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.


Firstly check your machine for viruses & then check antivirus settings don't use firewall of antivirus.Use only windows firewall. Remove that antivirus firewall from your computer.This issue is also occurring due to either your ADSL router having problem or problem from your ISP.Contact your ISP.

Tushar Kaskhedikar
andy7789Author Commented:
Please read my post:

1) I have disabled firewall

2) How could it be a problem with ISP or router settings, if the 2nd PC shows 3 times higher UL?

3) Both PCs show identical UL speeds with different speed testers
may be you aware about this: xp's reserve bandwidth.

another thing: how your ADSL is connected with system , through usb or NIC ?

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Cloud Class® Course: CompTIA Healthcare IT Tech

This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.

Check the actual cable because it could be easily the cable at fault.
Is the Windows XP a clean installation?
Try the evaluation of Network Traffic Monitor 2.01 to try see if any of the processes is causing problems.
andy7789Author Commented:
xtreminator, thank you!

It is getting MUCH better after I changed xp's bandwidth settings. Is there something else I could tweak?
to andy7789:
as i know  there no other tweak for xp that optimizing INTERNET speed.
except one.
increasing TCP/IP connection limit, my advice is not to apply this one,while system used as a reliable service provider.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.