1. Please be more specific when describing a symptom.
......my computer has been running really weird....... will not help anyone trying to help.
2. Don't be paranoid about being hacked. There can be many "normal" reasons why your computer is " running really weird."
3. Since you asked about "scan ", do you have Malwarebytes installed?
If no, here is the download link. Select the FREE edition. No need to buy anything just yet.
http://www.malwarebytes.org/free/
After you have installed the free edition, you will be prompted to do an update. Do that.
Then click the Scanner tab at the top, and do a Full Scan.
When it is done scanning, it will tell you the result.
If it catches any, it will give you the list of viruses etc it has caught. You will then delete them.
See if your machine is running better after that.
Please post back the result.
You may have to do some more troubleshootings