CCleaner 7.10.1464 service crashes on Intel Core 2 Duo E6850 – illegal instruction CRC32 (0xC000001D)

CCleaner for Windows CCleaner Windows Bug Reporting
1

CPU: Intel Core 2 Duo E6850 @ 3 GHz
OS: Windows 10
CCleaner: 7.10.1464.0
Previous version: 7.9 works correctly

Event Viewer:
Faulting application: CCleaner_service.exe
Exception code: 0xC000001D

Faulting instruction:
CRC32 (SSE4.2)

The CPU does not support SSE4.2.

2

is this crash repeatable or one time? are you cleaning registry?
What antimalware do you use? are you doing something in particular with ccleaner when the crash occurs?

3

The crash is fully repeatable. It happens every time I start a cleaning operation.

I am not cleaning the registry.

I am using Microsoft Defender as my antimalware.

The crash occurs right at the beginning of the cleaning process, before the cleaning actually proceeds. I am not doing anything unusual with CCleaner.

Windows Event Viewer reports:

  • Faulting application: CCleaner_service.exe

  • Version: 7.10.1464.0

  • Faulting module: CCleaner_service.exe

  • Exception code: 0xC000001D (illegal instruction)

  • Fault offset: 0x10D2ABA

I investigated the crash with x64dbg and the instruction at the crash location is CRC32, which requires SSE4.2.

The machine is an Intel Core 2 Duo E6850, which does not support SSE4.2.

This problem appeared with CCleaner 7.10. The previous 7.9 version worked correctly on the same machine.

Simply starting a normal cleaning operation is enough to reproduce the crash every time.

4

@Laurence_CCleaner

5

Hi @Gilles92,
Please follow these steps to help us investigate the issue:

  1. Download and install the CCleaner Support Tool using the link below: https://download.ccleaner.com/CCleanerSupportTool.exe

  2. Replicate the issue on your end.

  3. Run the tool to generate the logs.

  4. At the end of the process, you’ll receive a 5-digit File ID.

Please share that File ID with me so I can review the logs and investigate further.

If you have any issues, please let me know.

6

Hello,

I was able to reproduce the issue. Here’s your file ID : I3Y8D

7

Thanks for these log files, I have sent them over to the development team to review and I will follow up when I have more details.
If you have any questions please message me back.

8

Hi @Gilles92,
The development team has advised me that this issue will be fixed in the v7.11 update to CCleaner that will be released soon.
As it is in active development, I am not able to give a specific timeframe on when the update will be available.

9

Nice, Laurence !

Have a great day !

Gilles

1 Like
10

Hi @Gilles92,
We have just released v7.11.
Please update to v7.11 and let me know if this issue has been resolved for you?

11

Yes, it has been resolved !

Thanks Laurence

1 Like
13

Thanks for the confirmation @Gilles92