We recommend getting BitDefender Antivirus Plus and run a thorough scan of your computer to see if you are caught by any viruses or malware. Viruses and malware can cause your Dell laptop to run slowly as well as some other serious issues. The performance increase you can get may vary. If your Dell laptop is brand new or relatively new, the performance issue is probably related to Windows 10 itself, or a third-party program you just installed.

If your Dell has been a couple of years old, the main culprit could be outdated hardware - for examle, inadequate RAM, hard drive under-performing, etc. If your Dell is slow while browsing the Internet, it could be the Internet browser you use is too heavy - loaded with too many third-party plugins, caches, and so forth. General slowdowns can be resulted from a lack of hard drive space, running multiple programs at once, malware infection, laptop overheating, etc. There are a number of possible causes out there, and the real reason can vary from case to case.