Avast WEBforum
Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: amunerato on November 16, 2011, 06:17:57 PM
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Good Afternoon, I have the license for Avast Internet Security and bought an LG-A520 notebook recently.
When I install avast my upload transfer rate drops dramatically over the network.
Without avast with a rate of 1MB/s to 30MB/s and with avast installed with only the rate of 5KB/s to 20KB/s.
Download rate are normal.
Remembering that I'm talking about file transfer via local network and not on the internet.
Another detail is that even disabling Avast does not solve the slow, being necessary to uninstall avast to improve the rate
My adapters are:
Networking: Atheros AR8151 PCI-E Gigabit Ethernet Controller (NDIS 6.20)
Wireless: Ralink RT3090 Wireless LAN Card BGN
S.O.: Windows Home Premium - Service Pack 1
Thank´s
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Have you uninstalled the AV that would have come preinstalled in your notebook ?
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Do not come any anti-virus installed on the notebook.
There was only one option may install Norton, but I refused.
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Do not come any anti-virus installed on the notebook.
There was only one option may install Norton, but I refused.
Thats strange as they always come with an AV i thought but you have the option to accept the trial usually.
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There was only one option may install Norton, but I refused.
meaning the installer is on your computer ?.....and should be removed
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AV did not come, Norton had the option of a desktop shortcut to download and install it, but alas not accepted and installed Avast.
Has installed Windows Defender. Could it be related?
Tanks.
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I would still run the Norton removal tool just to be sure ;)
run and reboot - http://singularlabs.com/uninstallers/security-software/
when done you just drag and drop the tool in the recyle bin
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I run both tools available and reboot, but had no effect.
I'll try again after reinstalling Avast to see if these changes solve.
I do at night, because now I'm at work.
Any more suggestions?
Something with Service Pack 1?
Tanks.
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Hi,
did the rates drop right after the installation of avast? If not, did you try a clean reinstall of avast! with the uninstall tool?
Maybe there is also some filtering driver active on the network card, which slows down the network connection, when working together with avast! filtering driver. You can check in the settings of your network connection, which filtering drivers are active.
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Hi,
Yes, the drop only occurs when I install avast and only when I upload, the download is normal.
I uninstalled avast and downloaded to the site and again the same problem occurs.
It has no filter on the devices.
I'm thinking it's something related to Windows or service pack.
this weekend I'll have more time, going back a picture of some weeks ago and see if you encounter the same problem and if you need to restore the original factory.
The bad thing is that I have the license of avast 2 years and wanted to use it, but I see I'll have to put another anti-virus.
Thanks.
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Hi,
any progress on this topic? I was just faced with the same behavior.
Download from network data storage is OK (11MB/s in my case, corresponds well to used 100M LAN).
Upload before Avast installation was OK (the same speed 11MB/s).
After the Avast installation the upload speed dropped by factor 500 to ~20kB/s.
Any ideas how to solve it?
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Hello
Im having same problem too. Bought new laptop (asus u36sd) and i have payed version of Avast.
I noticed that i have same network card that first have. Atheros AR8151 PCI-E Gigabit Ethernet Controller (NDIS 6.20).
Cant solve this my self...
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Hello
Im having same problem too. Bought new laptop (asus u36sd) and i have payed version of Avast.
I noticed that i have same network card that first have. Atheros AR8151 PCI-E Gigabit Ethernet Controller (NDIS 6.20).
Cant solve this my self...
Asus laptops come preinstalled with Trend Micro, have you uninstalled this first and then run the Trend removal tool before installing avast? you'll find the removal tool here http://singularlabs.com/uninstallers/security-software/ ( Please read the info link first before running removal tool )
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Hello
Im having same problem too. Bought new laptop (asus u36sd) and i have payed version of Avast.
I noticed that i have same network card that first have. Atheros AR8151 PCI-E Gigabit Ethernet Controller (NDIS 6.20).
Cant solve this my self...
Asus laptops come preinstalled with Trend Micro, have you uninstalled this first and then run the Trend removal tool before installing avast? you'll find the removal tool here http://singularlabs.com/uninstallers/security-software/ ( Please read the info link first before running removal tool )
Didnt help. Installed that Trend micro again because need my network to work. Uninstalled it again and installed Avast but same problem. Stopped all real time shields, no help. Opened all ports to my Lacie network assistant, no help.
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Hello
I would like to say that I have the same problem with Avast Internet Security ver. 7.0.1426 (with original key).
With installed Avast i have upload speed 27 KB/Second with uninstall Avast i reach 11MB/second that is my optimal ethernet speed.
I would like to say that internet speed download and upload is OK.
PC configuration is ASUS N76VZ with:
Ethernet card: Atheros AR8161/8165 PCI-E Gigabit Ethernet Controller (NDIS 6.20)
Wireles card: Intel(R) Centrino(R) Wireless-N 2230
On both card are ethernet upload very slow
Server is a pentium based pc with 2 network nic with ClearOS based software.
On the network i have 5 more pc with windows 7 (x64) OS and the same Avast Internet security (with original key) with intel or nvidia ethernet nic and is workin fine.
Disabling modules don't resolve the problem, only when I uninstall Avast from the PC upload start to worko normally.
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I have exactly the same problem with exactly the same ethernet driver
Can we please get some response. By the way I hnave no other Internet Security software installed in case that answer is trotted out again.
Thanks
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Hi Guys
Ok well I upgraded my driver to version 2.0.14.15 - search in google to find it. I didn't notice much difference. I changed the network cable which was a CAT 5 to a CAT 6 cable and the problem has gone - I can't believe it was that simple. It seems the cable was at fault. Before changing it I was lucky to get 10k/sec - yes kilobytes. No I am getting 12-13 Mb/sec so a vast improvement. I suggest checking your cables first - it is the easiest and least time consuming thing to check (assuming you have a spare cable of course ha ha)
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Hi again
One more thing that makes a significant difference is to go to Device Manager and open the propoerties for the Network Adapter, click the Advanced tab and disable Large Send Offload (IPv4) and enable Large Send Offload v2 (IPv4). You can also try changing the Flow control from RX & TX to disabled and check, if no difference re-enable (because it is the default) and also try disabling the Interrupt Moderation and testing. Test by sending a file to another computer on the network.. That is how I got mine working.
Hope it helps
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Hello
Tested with slipperex advice and I must say thai it's working ;)
This is my steep by steep how I resolve the issue on my Asus N76VZ notebook
01. Uninstall Microsoft Security Essential (just for antivirus conflict)
02. Uninstall Atheros Lan driver version 2.0.12.13
03. Restart notebook
04. Install new Atheros driver version 2.0.15.16 (found on internet thanks google)
05. Restart notebook
06. Fix my lan connection from automatic to static lan IP address
07. Restart notebook
08. Install Avast Internet Security version 7.0.1426
09. Restart notebook
10. Test upload ethernet transfering rate of 6Mb small file but my upload speed is in KB nothing change >:(
11. Change cable, change port on switch, reload all network from switch to router nothing change only KB transfer rate :'(
12. After tha t I decide to change atheros settings: CotrolPanel - System and Security - System - Device Manager - Network adapters - Atheros Lan Card - Propertie - Advanced (tab) and change next settings
- Large Send Offload (IPv4) and dissable
- Large Send Offload v2 (IPv4) and enable
- Flow control from RX & TX and disabled
- Interrupt Moderation and dissable
13. Try to upload the same 6MB file over ethernet and bang i recive transfer rate in MB/sec now I test with more biger file about 200MB and the transfer rate is about 11MB/sec :)
14. Restart notebook (only to check that I fix the slow transfer rate)
15. Start the same transfer and yes it's working ::)
16. Last 2 modfication to change: CotrolPanel - System and Security - System - Device Manager - Network adapters - Atheros Lan Card - Propertie - Advanced (tab) and change next settings
- Flow control from dissable back to RX & TX enabled
- Interupt Moderation from dissable to enable
and the transfer rate is in MB/sec 8)
17. Last thin I upgrade Avast Internet security to new version 7.0.1451 and the transfer rate becom better aprox to 12.5MB/sec transfer rate 8)
Thanks once again
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Hi again
One more thing that makes a significant difference is to go to Device Manager and open the propoerties for the Network Adapter, click the Advanced tab and disable Large Send Offload (IPv4) and enable Large Send Offload v2 (IPv4). You can also try changing the Flow control from RX & TX to disabled and check, if no difference re-enable (because it is the default) and also try disabling the Interrupt Moderation and testing. Test by sending a file to another computer on the network.. That is how I got mine working.
Hope it helps
I registered just to confirm that the above suggestions worked for me. Same problem w slow network transfers 30Kb/s and less. Network adapter: Atheros AR8151 PCI-E Gigabit Ethernet Controller (NDIS 6.20)
I install avast before doing anything else so I wasn't aware there might be a connection. That said , I made all of the changes suggested above and the transfer of a 17MB file went from taking 10+ min to INSTANTANEOUS.
Specific Changes I made:
Flow Control: Tx & Rx Enabled > Disabled
FlowControl: Enabled > Disabled
Large Send Offload (IPv4): Enabled > Disabled
Large Send Offload v2 (IPv4): Disabled > Enabled
I performed NO un/installation. As soon as I clicked ok, my existing connections were reset and speeds Jumped. Tested larger files with these changes and saw 21MB/s. Going to do some R&D on the settings I changed, but thought it was worth confirming validity of these suggestions
THANK YOU slipperx!
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Hi,
I've met the same issue.
Computer: Alienware m17x R3; Network card: Atheros Ar8151; AV: Avast Endpoint Protection Suite Plus.
Solution: It was quite enough to disable the "Largesend offload" option at the network adapter/properties/setup/special.
All the other options are not necessary to change.
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Borisrd,
Thank you for your input. I spent all day trying to figure out why my NIC wouldn't transfer over 1MB. Though it wasn't hampering my online experience greatly, it was driving me nuts. The suggestion to disable "LargeSendOffload" did the trick.
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Wow! Thanks so much. Just building up a new system and I ran into the same problem with an Atheros AR8161/8165 ethernet controller giving perfect download speeds but horrendously slow uploads. The simple step of switching off "Large Send Offload (IPv4)" to "Disabled" fixed it. I went from like 0.25-0.6 (!) Mbps to 3.5-4 where it should be.
I don't even have Avast or anything of the sort even installed at the moment so it is something other than an Avast conflict issue alone.