Yes you can leave Tweaking.com Registry backup... this can be set to create a backup once a day, each time the computer is started or you can just leave it and create a backup when making changes to your computer.
I and many others use the free version of Malwarebytes' Antimalware... it is up to you which you decide to use. If you want the Pro version, then you'll have to buy it.
If you want to continue to use the free version, leave it installed and update/run it weekly.
Many people simply use the built-in anti-virus product (Defender) that came with Windows 8. On my Windows 8 computer I use Windows Defender, Malwarebytes' Antimalware (free version) and WinPatrol... that's it and haven't had any problems with infections. Just remember that no anti-virus product is going to find and remove everything, so if you want to change your antivirus product, you would have to disable Defender, before installing any other Anti-virus product. Having more than one Anti-virus product running at the same time can cause system instability or even crashes.
Again the McAfee product you have is NOT
an antivirus product, it offers NO protection. It simply can be used to scan your computer to see what security products you have installed and what their status is (ex: updated, disabled, etc). Do not confuse this product with McAfee antivirus product they are 2 entirely different items.
Some final steps... and some reading for you. As always don't hesitate to ask, if you have questions.Create a System Restore Point - W8
< STOP > If you did not successfully complete this step. < STOP > Do not continue with any other steps, post back and let me know! Update your Antivirus programs and other programs regularly. FileHippo.com Update Checker
- Click the Start button , then right-click on Computer, then click Properties.
- In the left pane, click System protection. If UAC prompts, allow it.
- Click the System Protection tab... then click Create.
- In the System Protection dialog box, type a description... then click Create.
A Restore Point will be created and you should receive a message: "The restore point was created successfully."
- Click Close and exit.
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Keep on top of critical updates , as well as other updates for your computer. Windows Update in Windows 8 FAQsWindows Update - Protect Your PC Microsoft How-To Install additional (free) programs, that can help improve security.
Many feel that having a "layered" protection scheme is beneficial, you'll have to decide what works best for your situation.
Here are a few you can look into, if you want. Malwarebytes' Anti-Malware
You have this installed already, run scans weekly (at least)... make sure you check for updates before running scans.
Download it from Malewarebytes © Malwarebytes Corporation.
Tutorial available on how to install and use, can be found here
Powerful, easy to use and free. For real-time protection you will have to purchase the product.WinPatrol
Do not install if you have installed Spybot Search & Destroy and enabled Teatimer protection. System conflicts can occur.
Download it from Copyright © BillP Studios
Information about how WinPatrol works, is available Here
(The free version of WinPatrol... provides limited real-time protection) Read, stay informed.
To help minimize the chances of becoming re-infected, please read. Computer Security - a short guide to staying safer online
If your computer is running slowly after your clean up, please read.What to do if your Computer is running slowly Please let me know that you completed the cleanup steps, the create/purge System Restore point steps and reviewed the rest of the post.
Once I receive your reply, unless there are other malware questions or concerns, I will have this topic closed as resolved.