The rtf64x64.sys is a system file for Realtek internet driver that mainly deals with ethernet port connection.
However, when rtf64x64.sys driver fails, you might get a blue screen error withDRIVER_IRQL_NOT_LESS_OR_EQUALorSystem Service Exception.
If you receive this issue frequently, you could follow the solutions below carefully.

Its noted that all the following solutions are based on a bootable computer.
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How to Fix rtf64x64.sys Blue Screen of Death?
Heres how to install an update available of your online grid drivers.
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Typerunin the search bar and hitEnter.
In theRundialog, typedevmgmt.mscand hitEnterto launchDevice Manager.
ExpandNetwork adapters> right-hit your web link driver > selectUpdate driver.

Click onSearch automatically for driversand follow the on-screen wizard to complete the process.
What is NVIDIA GeForce RTX 4050 Ti?
How to download, install and update the graphics driver?
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Read through this post to get detailed tips.
Therefore, you should perform a full scan of your gear via Windows Defender.
To do so:
Step 1.

Go toUpdate & Security>Windows Security>Virus & threat protection.
Click onScan options> tickFull scan> hitScan now.
Do it’s crucial that you bypass Windows Defender on your Windows machine?

If you have no ideas about it, read through this post to get three ways.
Fix 3: Run SFC & DISM
Step 1.
RunCommand Promptas an administrator.

In the command window, typesfc /scannowand hitEnter.
To do so:
Step 1.
Click onRestart now and check for problems.
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After the process is done, follow the directions on the screen.
To do so:
Step 1.
Typerstruiand hitEnterto launchSystem Restore.
Select arestore pointand hitNext.
PressFinishto start the restoring process.
Windows 10 System Restore stuck on initializing or restoring files?
This post gives helpful ways to fix System Restore stuck issue in 2 cases.
Have a nice day!