CRUSHCLANS is classified as Win32:PUP-gen (potentially unwanted program).
What is PUP?
PUP is crapware. CRUSHCLANS have several types of unwanted behaviour:

1. Displaying popup ads.
2. Hijacking your browser.
3. Infecting your desktop shortcuts, etc.
4. Inserting ads to the web pages.

CRUSHCLANS can redirect your browser search, collect your personal information and sell it for advertising.
CRUSHCLANS is usually hard in removing. Some people could not find uninstall program for CRUSHCLANS in the Control Panel.
Sometimes CRUSHCLANS uninstaller does not work.

How CRUSHCLANS got on my computer?

Usually you got CRUSHCLANS with as part of a bundle with another tool you downloaded from the Internet. Since CRUSHCLANS manufacturer pays software developers for distributing CRUSHCLANS within their applications, CRUSHCLANS is often included as part of the installer.
Usually, you have not only one CRUSHCLANS problem, but a bunch of similar WIN32:PUPs.

How to remove CRUSHCLANS?

Step-by-step Guide for manual removal of CRUSHCLANS:

1. Uninstall CRUSHCLANS using Windows uninstallation applet (use Add/Remove Programs or Uninstall Program or Apps & features).
2. Open Task Manager to kill all "CRUSHCLANS" related processes.
3. Use Windows search to find and remove "CRUSHCLANS" files and folders.
4. Run services.msc to disable a "CRUSHCLANS" Windows service.
5. Execute taskschd.msc to get rid of "CRUSHCLANS" scheduled tasks.
6. Open regedit.exe and delete CRUSHCLANS registry keys and values.
7. Check your shortcuts on your desktop and in the Start menu for CRUSHCLANS presence. Fix infected shortcuts.
8. Remove a virus from Google Chrome.
9. Remove a virus from Internet Explorer.
10. Remove a virus from Mozilla Firefox.
11. Clean your Recycle bin and temporary files.