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.
When you're preparing to return to work, it's hard to predict how often you'll need to pump your breasts to provide milk for your baby. Ideally, you will pump at work as often as you would have breastfed your baby at home. Realistically though, mothers often find that in an eight-hour workday they are able to pump during morning, lunch and afternoon breaks. Since time is in such short supply, using a pump that allows access to both breasts at the same time is a real help. By double pumping, mothers keep their prolactin (an important lactation hormone) level up, and they may be able to pump in 10-15 minutes rather than 20 to 30 minutes.