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Serial Port
Posts: 22
Registered: ‎10-30-2009
Location: United States
Views: 464,802
Message 1 of 19

What is UNCServer.exe?

I am running Windows 7 on a ThinkPad T410. I have all the latest updates installed from both Microsoft and Lenovo.


When I use Alt+Tab, I see the following application.


It is located here: C:\Program Files\Lenovo\System Update\UNCServer.exe


Can anyone tell me what this does and why it is always running on my computer?

Bit Torrent
Posts: 1,213
Registered: ‎12-24-2010
Location: Perth, Australia
Views: 465,513
Message 2 of 19

Re: What is UNCServer.exe?

Hello mate,


The latest version of TVSU let that thing open all the time. Don't know what it is. I have to close that manually each time I check for updates with TVSU.


Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information on it.

ThinkPad T510 4313-CTO Windows 8 x64 - Intel Core i7-620M - NVIDIA NVS 3100M - 8GB RAM - 240GB SSD- Intel Centrino Ultimate-N 6300 - Gobi 2000.
ThinkPad Helix 3697-CTO Windows 8.1 x64 - Intel Core i7-3667U - Intel HD Graphics 4000 - 8GB RAM- 256GB SSD - Intel Centrino Advanced-N 6205 - Ericsson C5621gw

Serial Port
Posts: 22
Registered: ‎10-30-2009
Location: United States
Views: 464,150
Message 3 of 19

Re: What is UNCServer.exe?

Good call. I rebooted and it wasn't there. I open and closed ThankVantage System Update, but UNCServer.exe remains running in the background.

What's DOS?
Posts: 1
Registered: ‎05-29-2011
Location: Europe
Views: 458,559
Message 4 of 19

Re: What is UNCServer.exe?

Even worse: if you are using windows firewall, when you start lenovo system update, two inbound rules are programmatically inserted in the firewall that permit inbound TCP and UDP traffic to UNCServer.exe. I have found no way to avoid this. Every time I run system update, I have to delete the two new rules by hand. Even if I create blocking rules to block inbound traffic to UNCServer.exe, system update will eliminate my rules (any rules regarding this exe) and create its own ones. Awesome!
Posts: 9,598
Registered: ‎12-26-2009
Location: CA
Views: 458,524
Message 5 of 19

Re: What is UNCServer.exe?

Blargh. I was wondering what that is. Alt+Tabbing to it and hitting Alt+F4 makes it go away though.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
Blue Screen Again
Posts: 19
Registered: ‎05-21-2010
Location: Chicago, IL, USA
Views: 456,693
Message 6 of 19

Re: What is UNCServer.exe?



Really annoying to have it take up a slot in the task list when ALT+Tabbing

Token Ring
Posts: 53
Registered: ‎05-29-2013
Location: CH
Views: 388,479
Message 7 of 19

Re: What is UNCServer.exe?

2 years later and this is still not corrected??!!!

X320T running Windows 8.1 Pro x64
Blue Screen Again
Posts: 3
Registered: ‎12-25-2014
Views: 251,135
Message 8 of 19

Re: What is UNCServer.exe?

Approximately, 6.5 years later, the problem is still unsolved. Lenovo Team please reply and solve the problem!

Thanks in advance.

Blue Screen Again
Posts: 4
Registered: ‎10-24-2016
Location: US
Views: 250,959
Message 9 of 19

Re: What is UNCServer.exe?

I can attest to that. Saw it for first time today, as akKI2904 said -- about 6 1/2 years later. I was on mission to get Microphone Mute Button in ThinkPad W530 to work again after reformatting. My drive is too tiny for hulk programs of today that refuse to side-load to external drive. Back to point: I think perhaps it shows for allowing / participating in anonymous usage collection of their utility tools. Not sure though. Sometimes I say yes to participate, sometimes I say no. I might hunt down the participation and tick (confirm selection) NO to see if it stops. I've yet to reboot, but based on other's findings, I should expect to see this again.


Still a useful post, CustomerX

Bit Torrent
Posts: 4,580
Registered: ‎11-22-2011
Location: US
Views: 250,873
Message 10 of 19

Re: What is UNCServer.exe?

UNCserver.exe is system update(Universal Naming Convention) server module.

It runs as a separate windows task while System Update is running. It opens inbound TCP and UDP traffic to allow SU to self update and download install packages.


If you ALT+tab during SU running, a task window will appear with uncserver.exe.

On my windows 10 system, upon exit of SU, the uncserver.exe task is no longer showing via ALT+tab.


If you still see this task after SU is closed, please state the OS you are running and which version of SU you are using. Years ago there was a bug in SU where uncserver.exe did not terminate after SU was closed and left a ICON on the task bar, as/was showing in message 1 of this post. 

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