Hey there! Hello!
Computer updates, especially smaller security updates, contain security information for new bugs, malware, viruses, etc. that have been written since your last update. So many of these are written for computers at any given time, meaning that keeping your computer updated is a significant step in keeping your computer's defense systems working. Paired up with legit anti-malware, virus protection software, good computer knowledge, and common sense, your computer can remain very safe from these viruses. 
Otherwise, there might be some bug or irregularity within your computer's system itself that was accidentally released an update or two ago by the creators of your computer's software, which may also pose a threat for your computer system. Updating your computer can most likely fix problems like these. But, more commonly, they just keep your computer up to date on the vicious computer threats that are now available for it since the previous update. 
Hope this helped you out! Feel free to ask me any additional questions if you have any. :-)
 
        
             
        
        
        
Answer:
Check the explanation
Explanation:
// include the necessary packages
import java.io.*;
import java.util.*;
// Declare a class
public class DataReader
{
// Start the main method.
public static void main(String[] args)
{
// create the object of scanner class.
Scanner scan = new Scanner(System.in);
// Declare variables.
boolean done = false;
boolean done1 = false;
float sum = 0;
double v;
int count = 0;
// start the while loop
while (!done1)
{
// start the do while loop
do
{
// prompt the user to enter the value.
System.out.println("Value:");
// start the try block
try
{
// input number
v = scan.nextDouble();
// calculate the sum
sum = (float) (sum + v);
}
// start the catch block
catch (Exception nfe)
{
// input a character variable(\n)
String ch = scan.nextLine();
// display the statement.
System.out.println(
"Input Error. Try again.");
// count the value.
count++;
break;
}
}
// end do while loop
while (!done);
// Check whether the value of count
// greater than 2 or not.
if (count >= 2)
{
// display the statement on console.
System.out.println("Sum: " + sum);
done1 = true;
}
}
}
}
Sample Output:
Value:
12
Value:
12
Value:
ten
Input Error. Try again.
Value:
5
Value:
nine
Input Error. Try again.
Sum: 29.0
 
        
                    
             
        
        
        
Answer:
Close or disable all unused running apps.
Explanation:
Closing programs running in the background on your computer or mobile device helps to free up system resources for your other programs. These problems can be resolved where your system is running slowly or two programs are trying to use the same device hence causing the device or system to drag.
 
        
             
        
        
        
There are many answers to this question. The first step is normally a reboot, second, I would check witch task or service is taking up all the CPU cycles and check the system and error logs. The list goes on... I'm not sure how detailed you want to get.
        
                    
             
        
        
        
I would say the best clear answer is D, because A is a little bit unclear but I would say the best answer is D. 
Why? 
Mesh Topology is expensive considering more links as compared to Ring topology.