My laptop keeps loosing time and was about half- minute slower then two minutes slower than my other laptop. Both laptops are the same make and are synchronized with an internet time server. I ran sfc /scannow, and dism......./restorehealth, Belarc Advisor all ok. I run malwarebytes and super anti spyware every day. I have noticed that when I run Windows Defender every week it takes so long to do a full scan that I have had to change it to Custom scan when the scan has finished it says it has done a quick scan and I wonder it that is the prob? I can do a Windows Defender full scan on my other laptop without any issues. The laptop isn't a year old yet and the store where I bought it said I shouldn't be the battery. Can anyone help please?