1. Reboot your computer and while it is booting up (in the initial 2-4 seconds)press and hold Ctrl + f11 (2 keys). If you see a 'restore to factory settings' option, then you are good. DONT DO IT YET :) just wanted to check if your partitions are still there.

2. Before going to sleep, backup EVERYTHING you need on your external hdd.

3. Once you have BACKED UP YOUR INFORMATION. repeat step 1 and go ahead and restore.

4. Follow the prompts and you should be on your way to restoring (it takes like 30-45 mins). 

5. Once restored, use internet explorer to download chrome and avast.

6. Install avast.

7. move your backups back onto your computer.

8. Open Control Panel > Add remove program and remove bloatware.

9. Next time you watch porn careful downloading anything :)