Try the below steps given and update us
Check for any 3rd party security software’s like Norton, Kaspersky etc., if so remove it from the control panel and check the McAfee status
Run McAfee Virtual Technician (MVT) :
- Go to this link http://mvt.mcafee.com, Install and Run the MVT
- Check the McAfee status
Download and run the oas-disabled-fix.cmd utility :
- Download and save the utility from the link below to your desktop:
- http://download.mcafee.com/products/licensed/cust_support_patches/oas-disabled-f ix.cmd
- Double-click the oas-disabled-fix.cmd tool.
NOTE: If you use Windows Vista and 7 right-click oas-disabled-fix.cmd and select Run as Administrator.
Restart your computer and ensure that Security Center shows that Real-Time Scanning is enabled.