Windows Vista May Slow the Internet
by Mike Zazaian September 6, 2006 - 3:35pm, 35 Comments

Internet analysts fear that Vista’s use of two internet protocols may put heavy loads on servers and cause sporadic blackouts around the web.
Microsoft’s choice to use two internet protocals on Windows Vista may turn their new operating system into a black sheep. Vista is the first version of Windows to adopt IPv6, which allows for a broader range of internet addresses, meant to accomodate future generations of WiFi and bluetooth enabled media devices. Problem is, in order to remain standards compliant, the current standard IPv4 will also be used. This will force Vista to make both an IPv4 and and IPv6 request each time a page is visited, causing a double-dose of DNS traffic.
Paul Mockapetris, the man credited for creating the internet’s modern DNS (Domain Name System), was recently interviewed by the New York Times about the matter. In the interview Mockapetris expressed his concern that this problem with Vista might be enough to cause serious slowdowns around the web:
If you adopt Vista, your DNS traffic is going to double. You’re going to see brownouts. All of a sudden, it is going to be mud season on the Internet, where things will just be kind of slow and gooey.
Other industry analysts aren’t so worried about the DNS problem, however. While many agree that there will be slowdowns, it’s not widely thought that outages will occur. Dan Kaminsky, an independant internet researcher, is more optimisitic about the possible outcomes of the DNS problem:
Vista, due to its support for IPv6, will cause somewhat higher load on name servers as it checks to see which protocol to use. But this is not the stuff that blackouts are made of.
In the end, it’s a necessary step that Microsoft is making toward supporting a wider range of media devices. Whether slowdowns will occur around the internet remains to be seen, but such is the price of better expandibility for what will be Microsoft’s flagship OS for the next five years.
[Via cnet]



Not surprising, since almost eveything that Microsoft produces is in some way harmful
Michael Müller
There’s pretty much universal agreement that this entire story is bunk. There won’t be slowdowns, there won’t be blackouts, this is a non-issue.
I blogged the details on my web page. I tried to post them here, but this form makes any extensive post pretty hideous.
Dan Kaminsky
Well, I installed Windows Vista (before reading this post) and sure enough, my Internet speed went down from an average of 560 KBps down to a measly 11 KBps. This is outrageous!
Malek Ali
My internet is slow as well.. might not be because of this but it sure is much slower!! sometimes I have to actually reset the wireless router to get regular speed back again.. the thing is that my other laptop with xp pro still gets full speed when my vista laptop is slow!! after I reset then it get back but still the xp is much faster!
Diego
Well Ive experienced Vista’s W.O.W effect…
(Why O’ Why?!)
Windows Vista Premium Full £210.99
10Mb Broadband Connection (not ASDL) £35 a month
Spening hours and hours trying to figure out why my internet speed is now around 2Mb since I installed Vista - Priceless
what ever happend to the good old STABLE days of Windows 3.1?
Chiller
my sister has xp and i have vista. I did notice the great difference in internet speed. Vista really slows the system down. Sometimes its so slow that it feels like dial up. Its pretty bad.
alfredo
When I bought a new computer 2 weeks ago, Vista was preintsalled and everything seemed to work fine.
But I hads some other problems so I reformatted, and what do you know…..the internet becomes outrageously slow.
I have turned off IPv6, and I think I’ll go disable it in services.msc and give you the feedback of what happened.
Sincerely,
Ab
Ab
What a load of Frank…….
just bought a super computer , just for it to be 10 times slower……they really done it this time…….might to be going back to XP…
paul
I have seen these speed problems and i think i have found out some of the causes try turning off all phishing security it really speeds up your connection. also I just bought a preinstalled laptop with vista on a 64bit AMD but it came with 32bit ver and the serial wont install the 64bit ver god damn you DELL god damn you to hell.
Aaron Wicks
GRRRR!!! My 5-year-old 128mb ram computer works faster than my new vista…
Winnie
I’m using vista at the moment, and It seems that all my other computers using XP load basic websites like the google homepage alot faster- we have relatively fast broadband, and the loading time on vista is 4 to 5 minutes, but only 10-40seconds on XP.
Luke
I have an XP machine and a new Vista machine at my desk. They are both connected to the same router using ethernet cables.
I use http://www.speakeasy.net/speedtest/
and internetfrog.com to test internet speed
I just ran the tests on both machines with the following results:
Vista 2146 download 948 upload
XP 5993 download 950 upload
Some times the difference is thre or four times faster on the XP.
Also I have set Vista to use my full processor speed. By default it is throttled down to 50%.
This has little impact on the speed
Jim Collins
I just got a brand new system with windows XP on it. Iused it for a little while and i got great speed. Then i noticed downgrade in speed and now insted of 30mb/5mb i get 400k/90k now thats sux and im still paying the same money to my internet provider I dont know what to do
Sergey
I currently have a P4-2.66 with a gig of ram and I am currently running both O/S on seperate hard drives on the same machine. DSL for an ISP..
Now my XP Pro is loaded on a 40gig ide HDD, and my Vista Ultimate is loaded on a 160G Sata HDD, both on the same machine…
Benchmarked my XP
-Communications = 1.4MB/S
-Storage = 176.3 kb/s
-1mb file Download = 5.9sec
Benchmarked Vista
-Communications = 150.8 kb/s
-Storage = 18.4kb/s
-1mb file Download = 55.6sec
I then found the netsh fix on the internet and I then got this benchmark on Vista…
-Communications = 250.1 kb/s
- Storage = 30.5 kb/s
-1mb File Download = 33.5sec
Only thing that is different between the 2 is the O/S, same machine…anyone got any other ideas to help speed this pig up?
Tony
I did notice that the Phlishing check took a long time to load the webpage so I disable it. Some pages started to load faster. I disable it because I go to the same websites all the time so they are trusted sites. I noticed that the IPv6 said limited and the IPv4 said Internet, so I just disable the IPv6, but it did not load up faster. Maybe I am heading in the right direction. I did look up some other means to fix the problem and this is what I came up with:
Run following command from Admin-level command line prompt solved the problem:
netsh int tcp set global &
autotuninglevel=disabled
So my next step is to find out where I could input that command line.
Hopes this helps….
Robert
Try downgrading your network card driver.
Or selecting Roll-Back Driver in Device Manager, it should then display a date in the year of 2006 not 2007.
Just tried this on another Vista machine in the house and it changed the speed from 5Kb, to a little over 1.5Mb for the same file, even without a restart.
Should be the first port of call to change.
Dave
my net goes a lot slower using any browser in Vista…..but dwnld speed using accelerators is da same……also da speed tests hav suddenly gone highly inaccurate
Rahul
The Fix for Windows Vista Slow Internet Transfer -
I purchased a new laptop for my wife only to find Vista is about as fast as a snail with ricketts. I tried changing a number of things and enabling disabling things to increase the speed of connection via the internet and and none worked.
Then it dawned on me. Maybe some firewall setting was causing the Internet to slow down! I went directly to disable the McAfees Firewall.
Sure enough. After removing McAfee, Internet speeds went from a slow 48k dial up to over 5 MB/s. That’s back up to my XP speeds.
Eddie
i did these and it worked
1. turn off phising filter in tools-intenet options-advanced
2. turn off phising filter in Mcafee
3. turn off firewall in mcafee. windows firefall still intact
now the speed of internet on vista is fine. let me know if its working for u
jaj
slow internet
angel perez
Hello people,
I purchased a new HP Media Center M1867C quad core pc on August 14 of this year. It came with Vista Home premium and a 2.4GH speed. I was looking forward to blazing speeds online when downloading software. Instead the speeds of 9400kb/s to 9800kb/s that I was receiving using Windows XP Pro have been slashed to speeds from 400kb/s to 3000kb/s.
This is totally unacceptable for a line that cost $70.00 a month. Every now and then I get a speed of 8000 or 9500, but 90% of the time my speeds are now lower than 5000kb/s
What is vista doing that is slowing things down so much?
My old computer is just to my right. When I do speed tests with it they are as high as 10.67mb/s and the uploads are right at 1.00mb/s So I know the Cable is pumping out the proper signal strength.
Do I need to downgrade to XP PRO? Or is there some other way of correcting this? Other than that Vista works well for me, but I can’t tolerate the loss of 7000kb/s or more of my performance.
1. A Tweaks test from this page. Simply post the tests URL. Please make yourself pingable by lowering firewall, etc..
2. The fastest of the 3 speed tests from this page. See FAQ on copying test results if necessary. You might also run a test from the Speakeasy site as well. Please note this for us. Post your results and the location you used.
I’m using the Sun Java plugin based speed tests
Speed Test Result 1- Net Access NJ
Test 2007-09-24 13:17:33 EST @ speedtest.dslreports.com
1766 / 974 (Kbps)
(215.6 / 118.8 KB/sec)
Compared to the average of 447 tests from charter.com:
* download is 58% worse, upload is 76% better
Tweak test 1
http://www.dslreports.com/twea.....via=normal
Speed test 2–Broadstar
Test 2007-09-24 13:23:05 EST @ speedtest.dslreports.com
4787 / 672 (Kbps)
(584.4 / 82 KB/sec)
Compared to the average of 446 tests from charter.com:
* download is 11% better, upload is 21% better
Tweak test 2
http://www.dslreports.com/twea.....via=normal
My RWIN has been automatically set at “65536″ for both tests. That setting is way to low for this much speed and this computer.
It should be at least 131000.
Speed test 3 from Speak Easy-Aplo alto, Ca.
Test 2007-09-24 13:29:26 EST @ speedtest.dslreports.com
1127 / 968 (Kbps)
(137.6 / 118.1 KB/sec)
Compared to the average of 446 tests from charter.com:
* download is 73% worse, upload is 75% better
Tweak test 3
http://www.dslreports.com/twea.....via=normal
The RWIN is still set at “65536″ That is why the speeds are bad. Under XP with my eightyear old Dell XPS T-600 RWIN set are 131072, I’m getting 10.67mb/s down and 1.00mb/s up.
3. A Line Quality test from here. Please copy & post the URL in the red box! If the wait is too long, do this later if requested.
4. What type of Internet connection you have (DSL, Cable, Wireless, Satellite) and who your ISP (Internet service
I have a 10mb Cable line with Charter Internet.
My modem is a Motorola SB4200
7. Which operating system you use? Windows 98/98SE/ME, etc.
I’m using Windows Vista Home Premium
8. What your advertised speeds are (ask your ISP).
10000kb/s down and 1000kb/s up
10. If you use a NAT router (Linksys, Netgear, etc.) for sharing your connection, and if so, the brand and model of your router.
My router is a “linksys BEFSR41 Etherfast Cable/dsl modem
I’m using Cable
Clyde Benson
You guys just want to bitch and complain for nothing. Stop whining and downloading porn. Vista’s internet speed is fine
[DND] Clan Master
Hi,
Bought new Dell Deimension with vista, straight away internet speeds were shit, i have 2 laptops, one with xp and one with Vista using the same router, their speeds are fine.
Day 2 of new computer all speeds went back to normal.
Today after 3 days of normal speeds internet so slow ant even load a page not to mind downloading, dont know what happened to change this?????,
val
Valerie
Just bought a HP with windows Vista my internet has slowed down greatly. Download 1872 kbs and upload 270 kbs I have tried everything. With little or no help from windows I want to through this crap out the window. I am a gamer and I need my speeds if anyone out there could help me. I had xp laptop on the same modem and it worked great. They leave it to the people to figure out. We should just start our own windows company!
Brandon
Really dissapointed with vista. I have XP on my Laptop and spent over €1600 on a new desk top and the system is shit. Cheers Vista, thanks for nothing but a pain in the ass.
Hartey
If I knew that vista would be so slow, I would have never bought this crap OS
Dan
I hear a lot of whining and I’ve got the same problems, but I’m looking for some cheese to go with my whine. Anybody got answers?
Charles
WOW before my speed was somwhere about 192 KP and its droped to 10 kp!!
i mean is there somthing wrong with VISTA??????????
taz
I was too excited about installing a developer’s build of Vista Ultimate on my flaming last-gen machine, after hours of excitement by the candy visuals of Aero, I started to literally moan! The internet connection was surprisingly slow, the overall stability is a joke, the memory hogs are not fair(…) I’m gonna downgrade to XP on my dual boot Linux machine and going to burn the big bucks when buying a new MacBook Pro. I’ll be pleased to use Mac OS X and virtualization to run Ubuntu XP when needed.
Ernst
my computer i got in 2001 runs faster than my 2 week new vista
Reuben
Oiye Micurosofto, U SUCKO BIG JAPANESE BALLS! VISTA NO GOOD!!
mo likey, PISTA over Chinese Balls.
AHO, AHONDARA, CHIPOKE na systumu…
baka
BHOKUTO JAPAN
VISTA BLOWS, My Bittorrents Run at Baud 256. XP SMOKES TORRENTS. VISTA LEADS THE PACK IN HOW TO REALLY PISS OFF HACKERS. YOUR SYSTEM WILL BE HACKED TO PIECES. YOU THOUGHT XP WAS BAD.. HA, KERNEL TOASTERS AWAY……
KingKong@gmail.com
I Disabled Phishing in Tools –> Internet Options –> Advanced –> Security . Increased DSL from about 4000Kb/s to 6200Kb/s immediately. No other Phishing fiters on my PC. (ie McAffe or Norton).
Hope it helps someone….
Dave Stade