Windows 10

• No Hibernate/Sleep option in the Start -- Power (Dell Precision 5510)
• Some update disabled Hibernate/Sleep, disappear Hibernate/Sleep entries. There are two problems I found for this.
  • Disabled Hibernate: Use powercfg to check the status.
  1. powercfg /h on ... enable hibernate (powercfg /h /? gives you the help of /h option)
  • Disabled Sleep: S3 state seems a problem of this system.
    1. Disable S3 state with the BIOS Power setting.
    2. Control Panel -- Power Options -- Choose what the power buttons do (in the left panel) -- Change settings that that are currently unavailable: Add Sleep (also Hibernate if needed)
• Windows 10 Installation Error 0x80300024
• It seems multiple disk connection causes the problem. Disconnet all disks and run the installer again. (2019-6-26(Wed))
• Wireless network keeps disconnecting (often, frequently disconnection) (DELL Precision 5510 with Windows 10 to an O2 router)
  • Problem: When I use DELL Precision 5510 with Wifi with O2 router (O2 box 6431). Restart the router only solve the problem temporary.
  • What I see: It seems 802.11n of DELL Precision 5510 has a problem with my router. I am not sure the problem is which side (notebook or router). But these two stop communicate after a while. The router can still connect to Mac book and Fairphone, but the DELL notebook cannot connect to the router.
  • Solution I found: The following solved my problem
    • From Windows 10, Setting, search Device manager
    • Open breakdown Network adapters
    • Click Intel(R) Dual Band Wireless AC-8260 Properties to pop up a window
    • Choose Advanced tab
    • Select 802.11n Channel Width for 2.4 GHz to 20 MHz only (not Auto)