also now mcafee wont open
Try to perform a scan in safe mode.
Restart the computer and start tapping the F8 keys while the computer restarts , from the windows advanced boot menu select safe mode.
Follow the prompts and when you are at the desktop, click M icon and run a full scan from mcafee.
Note: Mcafee would give you a not protected message in safe mode , In safe mode, it gets disabled.
Complete the scan ; restart the computer and check whether you are able to access all the programs or if the scan detects any malicious programs.