It is about WiFi client, Vista 32Bits running on Asus V1S with Intel WiFi 4965AGN, driver latest version.
Connected to FritzBox 7390 router via WLAN, 5.2GHz. An external USB disk is connected to this router.
Router provides also some internal RAM/flash as NAS.
Client connects to this NAS through Microsoft Printer- and Filesharing.
Initially all is fine. Client boots up and connects to router.
It can connect to internet and connect to routers internal NAS.
But if user tries to copy some file from internal NAS to local disk
the WLAN connection crashes after about 1 minute.
Router is no more available. Internet connection does not work any more.
Reset of client is necessary to restore.
After the problem occurs some other WiFi client has no problems to communicate with router, its NAS and internet.
So, the client in focus seems to be definitely faulty.
Issue reproducible also if to access to USB external disk connected to router and available for clients as NAS.
There were no probs when FritzBox 7270 did the job in this network few months ago instead of addressed FB 7390.
Described problem did never occure while just working in internet.
Sometimes it is sufficient enough just to point with mouse cursor onto icons of files placed on NAS
in order to run into the described troubles.
What can be the possible reason of these probs?
How to fix it?
How to figure the root cause?