Wow. Some of those bogus flash player updates can infect your system with far worse than Drego Search. Do you have a backup of at least your important data? Fake "Flash Player" updates have been implicated in the spread of encrypting trojans too. I'd get a disk image backup or at least a fresh backup of your data (don't wipe out any older backups in the process) asap, then stop using the computer and head over to here for a good cleanout:
Don't leave the backup connected to the computer after it's complete.
Edited by Fremont PC, 30 April 2015 - 11:02 AM.