Windows 10: Quick scan taking too long > 2 hours

This has been happening since the last month. I don't know what to do. Help plz. I read previous thread no use. I don't use any other AV rather than default window defender.Its already been 2 hours and counting.....Estimated time is only increasing..........

:)

 

Scanning Takes too long

Time of scanning depends on many factors such as type of your files, activities in your process, your system specification and so on. But 12 hours seems to be very long.

How long does it takes to perform quick scan?

Wait a bit more and if it takes too long, then restart your PC and then run defragment and disk clean up.

 

Quick scan takes hours to complete

It is not uncommon for some security scans to take many hours while others finish quickly.

The speed and ability to complete an anti-virus or anti-malware
scan depends on a variety of factors.

• The program itself and how its scanning engine is designed to scan: using a signature database vs heuristic scanning or a combination of both...see
  
  How an Anti-virus Program Works.
• Options to scan for rootkits, adware, riskware and potentially unwanted programs (PUPS).
• Options to scan memory, boot sectors, registry and alternate data streams (ADS).
• Type of scan performed: Deep, Quick or Custom scanning.
• What action has to be performed when malware is detected.
• A computer's hard drive size.
• Disk size and used capacity (number of files that have to be scanned).
• Types of files (.exe, .dll, .sys, .cab, archived, compressed, packed, email, etc) that are scanned.
• Whether external drives are included in the scan.
• Competition for and utilization of system/CPU resources by the scanner.
• Other running processes and programs in the background.
• Whether the scanning engine stalls, hangs or freezes.
• Interference from malware.
• Interference from other security programs attempting to scan at the same time.
• Interference from other programs attempting to update (download/install) components from the Internet.
• Interference from the user (whether or not you use the computer during the scan).

To speed up a scan,
temporarily disable any other real-time protection tools you are using, close all open programs,
do not use the computer during the scan and perform a Quick Scan instead of a Full one. You can also speed up a scan by using file exclusions...What
Files Should You Exclude?.

 

Windows Defender - Quick Scan

Windows defender no longer offers a quick scan option.

My options are:

• Scan
• Advanced Scan

• Full Scan
• Custom Scan
• Windows Defender Offline scan

Whichever option I check, the scan will need to run for hours to complete.

Is a quick scan available?

How do I restore this feature?