File purpose and description:

YTSingleInstance.dll is a file that most likely was installed by you at some point, this would not have arrived preinstalled on your computer. Be sure to verify the exact hard drive location shown below. This file will run as a BHO in your browser everytime you browse the internet. This file is installed with Yahoo instant messenger, and this can also be removed without affecting your Yahoo IM. If you wish to remove this file, simply use a BHO remover to remove it from your browser, your Yahoo IM will continue to run fine without any issues. This file is considered safe and is not spyware or adware related software. (See the details below for the actual location of this file.)

Actual file or task name:
ytsingleinstance.dll

File type:
This is a DLL program.

File or folder location:
This program is currently located at C:\PROGRA~2\Yahoo!\Companion\Installs\cpn\YTSingleInstance.dll

General information:
Be aware that many tasks will be similiar names to existing tasks or processes. You can always view the running tasks on your computer by pressing ctrl-alt-del to view the windows "task manager", and then view the "processes" tab. This will show you all tasks running or currently active on your PC. Although this shows you all running tasks, it does not show dll file thats are loaded, as they get loaded as part of other processes. Many spyware writers attempt to hide their files on your computer, for example, ytsingleinstance.dll may be intentionally misspelled to look like a similiar task, or spyware may be named very similiar to a Windows system task. The reason they do this is so you cannot easily recognize the name in your tasklist as I have mentioned above. Make sure always check the location of the file if you are concerned. You can always find the location of ytsingleinstance.dll on your computer by using your Windows search options, but I will also try to list the file location of every file described on this website, so you can verify the correct location. You can view the entire tasklist directory with the link below.

Lookup other processes below.
besclient.exe	bginfo.exe.lnk	bhocitus.dll	bisoncom.exe	bitcomet.exe
bittorrent.exe	blackworm.exe	blavol32.exe	bldbubg.exe	bluetoothauthenticationagent.exe
boc425.exe	bolger.dll	boomerang.exe	bootconf.exe	botzor.exe
bpcable.exe	brctrcen.exe	broadbandadvisor.exe	browseui.dll	brstdvpt.exe
btgrab.dll	btnhnd.exe	btsoftphone.exe	buddy.exe	c4nn0t.exe
ca.exe	caftf.exe	calendar.exe	calmain.exe	canada.exe
carpserv.exe	cashback.exe	cavrid.exe	cavtray.exe	ccapp.exe
cccredmgr.exe	ccevtmgr.exe	ccleaner.exe	ccproxy.exe	ccregvfy.exe
ccsetmgr.exe	cd32.exe	cdac11ba.exe	cdmyidd.dll	ceres.dll
cfd.exe	cfgwiz.exe	cfp.exe	cfsserv.exe	chdaudpropshortcut.exe