If this is a recent occurrence then try fixing things via System Restore from Safe Mode.
How to repair the operating system and how to restore the operating system configuration to an earlier point in time in Windows Vista (or 7, or 8).
http://support.microsoft.com/kb/936212/#appliesto
See, Control Panel\All Control Panel Items\Recovery\ Open System Restore.
Use this as a guide as to where to find System Restore if you ever make it to the advanced startup options screen.
How to access Recovery, Restore and Reset Options in Windows 8.0 and 8.1
http://www.mytoshiba.com.au/support/items/how-to/776
How To Access Advanced Startup Options in Windows 8
http://pcsupport.about.com/od/windows-8/a/open-advanced-startup-options-windows-8.htm
How to remove Search Protect by Conduit Ltd
http://lavasoft.com/mylavasoft/company/blog/how-to-remove-search-protect-by-conduit-ltd
I see lots of recommendations here for programs like -
Malwarebytes' Anti-Malware
http://www.malwarebytes.org/products/malwarebytes_free
SuperAntispyware