Firefox add-ons strike again! I had an annoying redirect caused by one of their add ons a few months ago. I naively assumed that they were ok.
Check MBAM quarantine. I know from reviewing a thread in Bleeping Computer that it should detect the UniDeals PUP. This may help:
On the MBAM Dashboard click on Update Now
Go to the Setting Tab
Under Setting go to Detection and Protection
Under PUP and PUM make sure both are set to show Treat Detections as Malware
Go to Advanced setting and make sure Automatically Quarantine Detected Items is checked
Then on the Dashboard click on Scan
Make sure to select THREAT SCAN
Then click on Scan
When the scan is finished click on VIEW DETAILED LOG
Delete all in quarantine.
Regardless, run ADW Cleaner. It's very easy to use. Download, open, scan - it scans quickly. You can click each file tab to see what it corralled. Then hit "clean". It will reboot your computer when completed, and you'll see a text box at start up with a summary.
If you still have issues, which I'd be surprised, then proceed with downloading Junkware Removal tool, from Bleeping Computer. While UniDeals is not a virus, PUPs mimic them to a certain extent - redirecting, tracking, etc.
For bad infections, there are a few other downloads that you can graduate to.
I pray you will remain trouble free Marsha!