ince there are a few things that could cause this problem, there are also a few ways which you can use to fix it. First of all, you should check to make sure your modem is functioning normally;
1. Check all your wires and connections on your modem. If your modem seems to be working fine, check to see that you have the latest modem drivers installed. After making sure your modem driver is up-to-date, you can try to turn your computer off, followed by your router, then modem, waiting one minute after turning off each device. Then disconnect and reconnect the cables on all your devices and switch them on in reverse order starting with your modem, router and computer. This is called a power cycle and at times can fix your connection problems.
2. Since your LAN card could be the one causing this error to appear, you can try to reinstall your LAN card. But make sure to see if your LAN card is functioning well. If you find that everything is fine with your card, try disabling some features on your LAN card. To do this, you should have a manual you can refer to if you’re not sure how. One such feature on your LAN card (if present) which could cause error 651 is interrupt moderation.
3. If you are using a router to connect to the internet, it could be that your Windows auto-tuning feature has interrupted with your router function. So what you can do is to disable this feature. Open Command Prompt as Administrator (right-click it, select Run as Administrator). Then type in netsh interface tcp set global autotuninglevel=disabled, and exit. If it works, upgrade your router firmware and type this in Command Prompt to switch autotuning back on; netsh interface tcp set global autotuninglevel=normal.
4. If the error stems from the raspppoe.sys file, then a possible method of solution is to replace the raspppoe.sys file in Windows 7 with another one from Windows Vista. Though this method should probably be a last resort because changing a system file could be dangerous, it has worked on some computers and might work for you too. What you have to do is to open the folder C\Windows\System32\Drivers and rename the original raspppoe.sys file to something like raspppoe_a.sys. You then paste a Vista version of the file into your folder.
Here are some methods you can use to fix error 651 on your Windows computer. However, if you still have difficulty and want to fix the problem quickly, I recommend you use a registry cleaner to do the job.
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1. Check all your wires and connections on your modem. If your modem seems to be working fine, check to see that you have the latest modem drivers installed. After making sure your modem driver is up-to-date, you can try to turn your computer off, followed by your router, then modem, waiting one minute after turning off each device. Then disconnect and reconnect the cables on all your devices and switch them on in reverse order starting with your modem, router and computer. This is called a power cycle and at times can fix your connection problems.
2. Since your LAN card could be the one causing this error to appear, you can try to reinstall your LAN card. But make sure to see if your LAN card is functioning well. If you find that everything is fine with your card, try disabling some features on your LAN card. To do this, you should have a manual you can refer to if you’re not sure how. One such feature on your LAN card (if present) which could cause error 651 is interrupt moderation.
3. If you are using a router to connect to the internet, it could be that your Windows auto-tuning feature has interrupted with your router function. So what you can do is to disable this feature. Open Command Prompt as Administrator (right-click it, select Run as Administrator). Then type in netsh interface tcp set global autotuninglevel=disabled, and exit. If it works, upgrade your router firmware and type this in Command Prompt to switch autotuning back on; netsh interface tcp set global autotuninglevel=normal.
4. If the error stems from the raspppoe.sys file, then a possible method of solution is to replace the raspppoe.sys file in Windows 7 with another one from Windows Vista. Though this method should probably be a last resort because changing a system file could be dangerous, it has worked on some computers and might work for you too. What you have to do is to open the folder C\Windows\System32\Drivers and rename the original raspppoe.sys file to something like raspppoe_a.sys. You then paste a Vista version of the file into your folder.
Here are some methods you can use to fix error 651 on your Windows computer. However, if you still have difficulty and want to fix the problem quickly, I recommend you use a registry cleaner to do the job.
Related Post :-
How to Fix 504 Gateway Timeout Error
How To Stop Google Chrome Crashes
How to view javascript errors in firefox
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