Improvements and fixes
This non-security update includes improvements and fixes that were a part of KB4034664 (released August 8, 2017) and also includes these new quality improvements as a preview of the next Monthly Rollup update:
For more information about the resolved security vulnerabilities, see the Security Update Guide.
- Addressed an issue where spoolsv.exe crashes.
- Addressed issue where a DNS server stops working and doesn't respond to DNS requests in Windows Server 2008 R2.
- Addressed issue where WordPad crashes on launch.
Known issues in this update
Symptom
Due to a defect in WLDAP32.DLL, applications that perform LDAP referral chasing can consume too many dynamic TCP ports (potentially exhausting them) after installing KB4025337 and KB4025341. Applications and roles known to make these referrals may include Outlook.exe, DFSR, and others.
Workaround
To work around the problem, restart services or applications that perform LDAP referral chasing to free TCP dynamic ports. A reboot will also free ports. For example, restarting Outlook will free ports used by that application.
Symptom
If restarting applications that perform LDAP referral chasing returns normal functionality on machines that installed KB4025337 and KB4025341, you may be experiencing this issue.
Workaround
To work around the problem for cluster computers hosting the DFSR service, place the virtual cluster object under the Computers container to avoid reaching the referral chasing search, which leads to the dynamic port leak.
Microsoft is working on a resolution and will provide an update in an upcoming release.
How to get this update
This is provided as an Optional update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.
File information
For a list of the files that are provided in this update, download the file information for update 4034670.
Source: https://support.microsoft.com/en-us/help/4034670
Direct download links for KB4034670 MSU file from Microsoft Update Catalog:
:ar: Download KB4034670 MSU for Windows 7 32-bit (x86) - 119.5 MB
:ar: Download KB4034670 MSU for Windows 7 64-bit (x64) - 194.5 MB
My Computer
At a glance
64-bit Windows 11 Pro for WorkstationsIntel i7-8700K OC'd to 5 GHz64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600...ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- Self built custom
- OS
- 64-bit Windows 11 Pro for Workstations
- CPU
- Intel i7-8700K OC'd to 5 GHz
- Motherboard
- ASUS ROG Maximus XI Formula Z390
- Memory
- 64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz
- Graphics Card(s)
- ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
- Sound Card
- Integrated
- Monitor(s) Displays
- 2 x Samsung Odyssey G7 27"
- Screen Resolution
- 2560x1440
- Hard Drives
- 1TB Samsung 990 PRO M.2,
4TB Samsung 990 PRO PRO M.2,
TerraMaster F8 SSD Plus NAS
- PSU
- Seasonic Prime Titanium 850W
- Case
- Thermaltake Core P3
- Cooling
- Corsair Hydro H115i
- Keyboard
- Logitech wireless K800
- Mouse
- Logitech MX Master 4
- Internet Speed
- 2 Gb/s Download and 100 Mb/s Upload
- Antivirus
- Malwarebyte Anti-Malware Premium
- Browser
- Google Chrome
- Other Info
- Logitech Z625 speaker system,
Logitech BRIO 4K Pro webcam,
HP Color LaserJet Pro MFP M477fdn,
APC SMART-UPS RT 1000 XL - SURT1000XLI,
Galaxy S23 Plus phone

