Ycomp5_5_7_0.dll file information
The process known as Yahoo! Toolbar (version 5.5 for Internet Explorer) belongs to software Yahoo! Toolbar (version 5.5 for Internet Explorer) by Yahoo! (www.yahoo.com).
Description: Ycomp5_5_7_0.dll is not essential for the Windows OS and causes relatively few problems. The ycomp5_5_7_0.dll file is located in a subfolder of "C:\Program Files (x86)" (mainly C:\Program Files (x86)\Yahoo!\Companion\Installs\cpn\).
The file size on Windows 10/11/7 is 292,947 bytes. 
This .dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware.
IDs used by this BHO include 02478D38-C3F9-4efb-9B51-7695ECA05670.
The program is not visible. The ycomp5_5_7_0.dll file is able to change the behavior of, or monitor Internet Explorer. The service has no detailed description. It is not a Windows core file.
Ycomp5_5_7_0.dll is able to record keyboard and mouse inputs.
Therefore the technical security rating is 66% dangerous; but you should also compare this rating with the user reviews.
Recommended: Identify ycomp5_5_7_0.dll related errors
External information from Tony Klein:
Important: Some malware camouflages itself as ycomp5_5_7_0.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the ycomp5_5_7_0.dll process on your PC to see if it is a threat. If Yahoo! Toolbar has changed your browser's search engine and start page, you can recover your browser's default settings as follows:
Reset default browser settings for
Internet-Explorer ▾
- In Internet Explorer, press the key combination Alt + X to open the Tools menu.
- Click Internet options.
- Click the Advanced tab.
- Click the Reset... button.
- Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too
[1].
Make cleaning up your browser and your computer simpler and safer with
Security Task Manager.
- Copy chrome://settings/resetProfileSettings into your Chrome browser's address bar.
- Click Reset.
Chrome will then restart with an empty start page and with Google as the default search engine—without any popups, ads, cookies, themes or extensions
[1].
If you want to re-enable some extensions, please enter
chrome://extensions/ into your Chrome browser's address bar.
Make cleaning up your browser and your computer simpler and safer with
Security Task Manager.
- Copy about:support into your Firefox browser's address bar.
- Click Refresh Firefox.
Firefox now looks brand new. Bookmarks and saved passwords are retained, but all browser extensions and their related data are deleted
[1].
Make cleaning up your browser and your computer simpler and safer with
Security Task Manager.
Best practices for resolving ycomp5_5_7_0 issues
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active ycomp5_5_7_0 process on your computer and clearly tells you what it is doing. A good Bantivirus tool detects whether the ycomp5_5_7_0.dll file on your PC might be malware slowing down your system. Such unwanted programs are often not classified as viruses by other antivirus software and therefore go undetected.
A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To restore the original performance and remove unnecessary programs, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
Other processes
khost.exe e1i65x64.sys prhyper.exe ycomp5_5_7_0.dll broadwave.exe tppwrif.sys mdaxml32.dll initsrv.exe sma.multicasting.igmp.querierservice.exe _70a02663dfc8789ec3d334.exe t2e.exe [all]
Score
User Comments
Rich Roth (further information)
Dustin Goss (further information)
kent
Stuart Harris
OlsonMD (further information)
Anonymous
Summary: Average user rating of ycomp5_5_7_0.dll: based on 11 votes with 8 user comments. 5 users think ycomp5_5_7_0.dll is essential for Windows or an installed application. 2 users think it's probably harmless. 3 users think it's neither essential nor dangerous. One user suspects danger. 3 users don't grade ycomp5_5_7_0.dll ("not sure about it").