My computer is running much slower than normal and I think I probably picked up a virus or malware.   Can someone suggest the best free anti-virus program.  I have tried Malwarebytes,  Spybot,  Glary Utilities.   I use Microsoft Security as my basic Anti Virus.   Thanks in advance.
				
			 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		