Windows Defender is a software product that attempts to detect and remove malware. It was first released as a free antispyware program download for Windows XP, shipped with Windows Vista and Windows 7 and made into a full antivirus program replacing Microsoft Security Essentials as part of Windows 8 and later versions.
If you notice any resistance about your pumping schedule from your co-workers, go directly to the source and discuss any issues they have in a professional manner. If you need to clock in and clock out every time you pump, then do it. If you have to come in early and stay late to put in your hours, then do it.
Most companies will not allow you to clock in early unless you have been called in early-usually 10 min. before start of shift and no more than 5 min. after the shift ends. The company is supposed to pay you from the time you clock in until you clock out,but some people abuse it to get paid for time not worked.