Slow search on NAS after last Win10 Pro update

Question

Hello,

since the last Update the access to our NAS is unusablely slow with Win 10 Pro.

Try to fix with:

• NetBOIS deactived
• IPv6 deactived
• DirectoryCacheLifetime = 0
• FileInfoCacheLifetime = 0
• FileNotFoundCacheLifetime = 0
• Search in SysDirs deactived

This fix only worked on Win 11. Win 2019 Server didn't need any fix. Still working.

Shared are set up with IPs like \192.168.1.10\Path\ (Z:)

QNAP NAS: has SMB 2.1 bis 3.0.

Upgrade for PCs with Win 10 Pro to Win 11 is not an option.

Fixed with support:

• FDPHost set to automatic
• HKLM\SYSTEM\ControlSet001\Control\Lsa -> restrictanonymoussam set value 0

Answer 1

Hello

Thank you for your question and reaching out. I can understand you are having query\issues related to NAS performance slow.

1. Try to Disable AutoTuning using below commands.

netsh int tcp set global autotuninglevel=disabled”

Then Check the NAS speed then set back to normal.

“netsh int tcp set global autotuninglevel=normal”

2. Disable any Antivirus program or Windows firewall you may have for temporary purpose.
3. Disable fast startup using below command from elevated prompt

Powercfg -h off

--If the reply is helpful, please Upvote and Accept as answer--