Symptoms
- Parallels Client version 20.2.1 (build 25997) is crashing shortly after start.
- The published application disconnected immediately.
Event Viewer Log
Name of faulty module: TSClient.exe, version: 20.2.25997.0, timestamp: 0x684929fd
Exception code: 0xc0000005
Fault offset: 0x00000000002cac9
ID of faulty process: 0x76C
Start time of faulty application: 0x1DC1BE677079195
Path to faulty application: C:\Program Files\Parallels\Client\TSClient.exe
Path to faulty module: C:\Program Files\Parallels\Client\TSClient.exe
Report ID: 85456ad2-0ba7-47d4-a107-dc56b9f44292
Client Log
[I 00/00000123/T3B20/P30A4/S0001] 02-09-25 09:50:41 - Module version 20.2.0 (build 25997) - TSClient.exe 64bit
[I 00/00000123/T3B20/P30A4/S0001] 02-09-25 09:50:41 - Module version 20.2.0 (build 25997) - TSClient.exe 64bit
[I 02/00000007/T3B20/P30A4/S0001] 02-09-25 09:50:41 - Got an idle RDP server via GW: 'rasxyz.com:443' (10.10.10.10), SSL: Enabled, User: ras\user
[I 02/00000007/T3B20/P30A4/S0001] 02-09-25 09:50:42 - Opened RDP tunnel via GW: 'rasxyz.com:443' (10.10.10.10), SSL: Enabled, DTLS: Disabled, RUDP: Disabled
[I 02/00000007/T3B20/P30A4/S0001/C57CE3212] 02-09-25 09:50:42 - Start handling user session, match CorrelationID together with ProcessId to filter out all session messages.
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:42 - Connecting status: 1/'Initiating remote connection...'
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:42 - Connecting status: 3/'Configuring remote session...'
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:42 - Connecting status: 2/'Securing remote connection...'
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:43 - Connecting status: 3/'Configuring remote session...'
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:44 - Connecting status: 4/'Estimating connection quality...'
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:44 - Connecting status: 3/'Configuring remote session...'
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:44 - RDP session started.
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:44 - Network status changed - Quality:3 'Good', Bandwidth:1536, Latency:100, NetworkConnType:1 'Low speed broadband (256 Kbps - 2 Mbps)'
[I 02/00000033/T3B84/P30A4/S0001] 02-09-25 09:50:45 - Network status changed - Quality:4 'Excellent', Bandwidth:1925, Latency:62, NetworkConnType:1 'Low speed broadband (256 Kbps - 2 Mbps)'
[E 00/00000000/T3AA0/P30A4/S0001] 02-09-25 09:50:46 - Crash detected: Saving dump in 'C:\ProgramData\Parallels\RASDumps\Crash 2025-09-02 09-50-46.dmp' before exiting
Cause
This behavior has been observed after the installation of the following Microsoft Windows Update: KB5064081
Resolution
Upgrade Parallels Client (Windows) to v20.2.2.1-26020
Download Link: Parallels Client v20.2.26020
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