> Source: [sk171667](https://support.checkpoint.com/results/sk/sk171667)

# sk171667 - BSOD 'ATTEMPTED_WRITE_TO_READONLY_MEMORY (TDI.SYS)' occurs on Windows Server 2012 R2 occasionally after installation of E84.20

| Property | Value |
|----------|-------|
| Solution ID | sk171667 |
| Date Created | 2021-01-26 |
| Last Modified | 2021-05-04 |
| Technical Level | General |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |
| OS | Windows |

## Symptoms

- * BSOD 'ATTEMPTED_WRITE_TO_READONLY_MEMORY (TDI.SYS)' occurs on Windows Server 2012 R2 occasionally after installation of E84.20.
* BSOD occurs when using SMB (Server Message Block), copying files to a shared folder on the machine, scanning a file using a network printer and saving the scanned file on the machine.

## Cause

In same cases, writing to a read-only memory location occurs due to incorrect mapping previously done by our mini-filter driver. This causes BSOD.

<br />

## Solution

This problem was fixed. The fix is included in:

* [Enterprise Endpoint Security E84.60 Windows Clients](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk172325)

Check Point recommends to always upgrade to the most recent version ([Remote Access (VPN) / Endpoint Security Clients](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doShowproductpage&productTab=downloads&product=175) ).

For **other [supported](http://www.checkpoint.com/support-services/support-life-cycle-policy/index.html) versions** , [Check Point Support](http://www.checkpoint.com/support-services/contact-support/index.html) can supply a **Hotfix** .  
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.  
For faster resolution and verification, please collect [CPInfo files](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92739) from the Security Management Server and Security Gateways involved in the case.

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