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Running, Malicious, Unwanted, Memory Hogs

Welcome to the PC Matic Process Library. We maintain an extensive list of common processes running on today’s PCs. Within this library you can learn more about the processes running on your machine.

Process Library Detail

What is ycommon.exe? Yahoo Messager?

Vendor:      Yahoo
Product:     YCommon
Vendor Website:     
Last Seen by PC Matic:      No Data

Process is Bad PC Matic has analyzed this process and determined that there is a high likelihood that it is bad.
Process is questionablePC Matic has analyzed this process and determined that the safety of this process is questionable.
Process is goodPC Matic has analyzed this process and determined that there is a high likelihood that it is good.
Process is goodThis process is a Microsoft or Windows process, but many viruses use this file name to escape notice.

Purpose: ycommon.exe is part of Yahoo IM; if you use Yahoo IM frequently, leave this running. Otherwise, uninstall Yahoo Messenger if you never use the service.

ycommon.exe is required by third-party software or hardware and should not disabled.


ycommon.exe is known to be a bad process. Learn more about protecting your PC from these bad processes with PC Matic.
ycommon.exe could be a harmful process. Learn more about protecging your PC from these potential harmful processes with PC Matic.
This information brought to you by PC Matic. PC Matic's real-time protection, Super Shield, blocks ALL bad and unknown threats to keep your PC secure.
ycommon.exe is a Microsoft or Windows process but some versions of this exe carry viruses.
Learn more about protecting yourself from bad versions of this file with PC Matic.

Percentage of recently scanned PC's with this process running: 0.07%
Average CPU use for this program: 0%
Average RAM for this program: 4 MB


Program Name MD5 Count
ycommon.exe

MD5 Hashes

# Status MD5 Revision Name Size
1 Status 0xdc384325ffc20a35bbd2a49fae962153 6/21/2015 4:40:00 PM Unknown 2006, 3, 2, 1 Yahoo Messager 196 KB
2 Status 0x78c1bdd2613e4ffd67ea271e2f008515 10/11/2014 7:04:00 PM Unknown 2005, 2, 23, 1 Yahoo Messager 224 KB
3 Status 0x83e2b2ff4ecbed126c24f236787d3ca1 1/20/2012 1:07:00 AM Unknown 2003, 7, 14, 1 Yahoo Messager 208 KB
4 Status 0xc4a559b8ba86702fbc27131c14e86fc5 1/14/2012 8:58:00 PM Unknown Unknown Yahoo Messager 205 KB
5 Status 0x3e063a85a5b457ad0c3f35f03d4305cf 10/2/2011 3:31:00 AM Unknown Unknown Yahoo Messager 224 KB
6 Status 0x1646f316309b7d559aefc9429e808d35 8/16/2011 7:57:00 AM Unknown 2003, 9, 3, 1 Yahoo Messager 212 KB
7 Status 0xe8547a0edbec912d7148316c40875671 2/19/2010 8:13:00 AM Unknown Unknown Yahoo Messager 372 KB
8 Status 0x896392a9ca9fcdfc817c3ea6a4a8e091 11/30/2009 7:02:00 PM Unknown 2004, 1, 29, 1 Yahoo Messager 216 KB
9 Status 0x86cfe8e3c444bd2b6920439461f30727 9/18/2009 8:27:00 PM Unknown Unknown Yahoo Messager 369 KB
10 Status 0x819ea59bb123cc6b95f6c0a277cd03bd 9/14/2009 8:29:00 PM Unknown Unknown Yahoo Messager 216 KB
11 Status 0x257b3ca30fd3cb5d66c7b9cab1660759 9/12/2009 10:43:00 PM Unknown 2005, 1, 20, 1 Yahoo Messager 224 KB
12 Status 0xcda199bfb12445f56ebb5803039005d6 8/11/2009 1:13:00 AM Unknown Unknown Yahoo Messager 216 KB
13 Status 0x4afcf7a5edb8890d640ab5a89a9a689f 5/25/2009 6:06:00 PM Unknown Unknown Yahoo Messager 196 KB
14 Status 0x8d1f0bd42b7740ce9518b920efb24abf 4/8/2009 9:10:00 PM Unknown Unknown Yahoo Messager 216 KB
15 Status 0x15dfbaf2525e48db3f81579812531754 4/6/2009 3:52:00 AM Unknown Unknown Yahoo Messager 196 KB
16 Status 0xe35fff1b9ef7881669e84374ecf57148 2/14/2009 12:05:00 AM Unknown Unknown Yahoo Messager 216 KB
17 Status 0xa0f4e66f478494768d3d28769c5829a0 2/5/2009 9:08:00 PM Unknown Unknown Yahoo Messager 216 KB
18 Status 0xf569ba8a28c4cd5c921651f17bff1b90 11/22/2008 7:42:00 PM Unknown 2006, 3, 2, 1 Yahoo Messager 196 KB
19 Status 0xbe6941e23d24c18399e0126e718746ed 10/21/2008 11:16:00 PM Unknown Unknown Yahoo Messager 200 KB
20 Status 0xd944a339d87983d830d49a99047af259 10/7/2008 3:00:00 PM Unknown Unknown Yahoo Messager 208 KB
21 Status 0xce299ec16185a4a7965b9cfdfbc5e95e 9/16/2008 10:43:00 PM Unknown Unknown Yahoo Messager 204 KB
22 Status 0xedf26c4d3638f739957a65829d9a5e4e 9/5/2008 5:30:00 AM Unknown Unknown Yahoo Messager 196 KB
23 Status 0x2d34362193f60153b2ebd06d0ca21c89 9/1/2008 11:26:00 PM Unknown Unknown Yahoo Messager 218 KB
24 Status 0x0676a75f958f428fcd08a4e1f7a376f6 4/12/2008 3:11:00 PM Unknown Unknown Yahoo Messager 196 KB
25 Status 0x788d36bce28f097f967e9dfbbb7a98c1 4/5/2008 11:57:00 AM Unknown Unknown Yahoo Messager 196 KB


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