What is causing the ERR_SSL_BAD_RECORD_MAC_ALERT error?
We investigated this particular issue by looking at various user reports and the steps they took in an attempt to resolve the issue. Based on what we gathered, there are several common scenarios that will lead to the apparition of this issue: If you’re currently struggling to resolve this particular issue, this article will provide you with a selection of verified troubleshooting steps. Below you have several methods that other users in a similar situation have used to get the issue resolved. For the best results, follow the methods below in order until you stumble upon a solution that is effective in your particular scenario.
Method 1: Disabling HTTPS inspection from 3rd party antivirus settings (if applicable)
As per various user reports, the issue is likely to occur if you have a third party Antivirus software that is configured to inspect HTTPS traffic in order to guard against malicious attacks on the secure channels. Although this is not necessarily a bad thing, a lot of 3rd party AV suites including ESET, AVAST, BitDefender, and McAfee are reported to facilitate the apparition of the ERR_SSL_BAD_RECORD_MAC_ALERT error. Most affected users have managed to resolve the issue by disabling the HTTPS inspection feature from the AV’s settings. You can typically resolve this problem by preventing your 3rd party antivirus from doing any sort of HTTPS inspection (SSL scanning). Of course, the steps of doing this are highly dependent on the AV that you’re using. On BitDefender, you can disable this feature by going to Settings > General > Advanced and unchecking the Scan SSL entry.
If you are unable to find the equivalent settings (it might not have the option to disable HTTPS inspection), the only way to ensure that the error is not occurring because of your AV is to uninstall it completely. You can ensure that you uninstall it completely without leaving any leftover files (that will enforce the same rules) by using our guide on How to Completely Uninstall a Third-Party Computer Security Program. Note: Affected users report that the ERR_SSL_BAD_RECORD_MAC_ALERT error is not occurring while Windows Defender is the active security option. If this method wasn’t applicable to your particular situation or it hasn’t helped you to resolve the issue, move down to the next method below.
Method 2: Update Chrome to the latest version
Some users reported that for them, the fix was as easy as updating Chrome to the latest version. But keep in mind that this fix is only reported to be effective for users that have been only encountering the issue on Chrome and had a very old build installed (20 – 40). Here’s a quick guide on trying to resolve the ERR_SSL_BAD_RECORD_MAC_ALERT error by ensuring that you’re using the latest Chrome build: If you’re still encountering the issue (or you’re encountering the issues accessing certain websites with multiple browsers), move down to the next method below.
Method 3: Changing the router’s MTU to 1400
A lot of users encountering the ERR_SSL_BAD_RECORD_MAC_ALERT error have managed to resolve the issue entirely (on every device connected regardless of the used browser) by changing the involved router’s MTU value to 1400. The steps of changing the MTU (Maximum Transmission Unit) will be different according to your router manufacturer. However, we created some general steps that should point you in the right direction:
Method 4: Disabling Advanced Streaming Detection (Killer Network)
If you are using an Alienware or any Dell computer which has a Killer network card, you can try disabling the ‘Advanced Streaming Detection’. This option, even though useful, is known to cause conflicts with several modules and cause issues while browsing webpages as under discussion. This step will not interfere with your computer is anyway.
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