If your computer is using Windows 10 you may notice a few significant upgrades are posted for your system on Microsoft's updates screens. These upgrades will be dated as of about August 2 / August 9. Further updates may be pending.
Please note - these are major upgrades and may require special attention, particularly as they may take hours to download in the background - possibly slowing down your machine. Installation of the upgrades may cause your monitor to go dark for periods of time, as happened with the Windows 7/8.1-to-10 upgrade.
Assuming your updates run smooth, there are a number of glitches to expected. These are discussed in an article on the Web, "16 Windows 10 Anniversary Update Issues & How to Fix Them" written by Ben Stegner, August 9, 2016, posted at http://www.makeuseof.com/tag/16-windows-10-anniversary-update-issues-fix/ .
I won't go specifically into the fixes here, but will list the "glitches" below. If you notice any of these occurrences on your computer, they may be related to the Windows 10 updates released this month:
1. Apps Re-Pinned to the Taskbar
2. Default Apps Reset
3. Extra Ads on the Start Menu
4. Skype Preview Is Installed and Signs You In
5. Drive Partitions Missing
6. Update Error 0x8024200D
7. Storage Errors
8. Incompatible Software Error
9. Windows Won’t Activate
10. AU Clashes with Aero Glass
11. Force Disable the Lock Screen
12. Remove Cortana
13. Cortana Is Missing
15. Unreadable Clock Font
16. Start Menu and Explorer Freezing
These snags in particular are being tied to the so-called "Windows 10 Anniversary Update" recently publicized by Microsoft. There may be other issues arising depending on individual computers, but these are items which are being most widely reported.
Hope this information is helpful.
Arthur K. Burditt III