Windows 10, for those who love it, was about getting your cloud / online presence integration smoother (amongst other things). It was also about integrated search features and clever helpfulness.

Unfortunately it seems a lot of users are having to undo basic functionality they have had since Windows 7.

My issue - high disk usage making simple jobs impossible to work with, 11 minute startups, sitting for 5 -1 0 minutes waiting for the system to become responsive (even task manager taking 60-90 seconds to respond often).

Two major issues have been found that cause this for many people.

• 1 - Dropbox - which ironically is now being pushed by MS in some of its advertising. Turn it off and see what it does to the "system and compressed memory" task usage re disk access and memory usage. (to be fair, Cubby, google Drive etc are also possible culprits).
• 2 - Follow Microsoft's instructions below to disable Superfetch, Search, and notifications (seriously - notifications, search and super fetch - are officially being turned off to make Windows 10 work correctly).
• Lastly - I've turned off windows Defender using an app ( NoDefender ) that removes and disables it. made a huge difference to me. If you don't want to completely disable it add c:\ to your exclusions list, which will still allow scanning of incoming network traffic but not saved files.

I'm hoping this resolves my issues, but if it doesn't I'll turn off all network apps and as many services as possible until I uncover the source of the problem.

MS's Offical Help (Vian MS support engineer) says:

http://answers.microsoft.com/en-us/windows/forum/windows_10-performance/system-and-compressed-memory-high-disk-usage/a2a6169a-426e-4e6b-88fe-5ec0e9362be9

The issue with "System and Compressed memory" is rather a common issue that many of our users face. Please do follow the below steps to troubleshoot.

Step 1: Update all the drivers.

Please update all the drivers in Windows 10 computer and check if it works. You can do that by,

1. Press Windows key + X key and select the Device Manager.

2. Select all the drivers one by one and right click it and select "Update driver software..." and check if the issue persists.

if the issue persists, please go for the below step.

Step 2: Turn off the "Show me tips about Windows"

Please do the below steps to do the same.

1. Press Windows key + I key and open the settings.

2. In the settings, select the System>Notifications and actions> turn off the  "Show me tips about Windows".

3. Restart the computer.

If still the issue persists, please follow the below step.

Step 3: Modify the registry.

Please follow the below steps to troubleshoot. (Read disclaimer before proceeding)

1. Open Notepad and type the following.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\TimeBroker]

"Start"=dword:00000003

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SysMain]

"DisplayName"="Superfetch"

"Start"=dword:00000003

2. Save with extension *.reg ( example solution.reg)

3. Double click the file and merge it.

4. Restart the PC

DISCLAIMER:  Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. Also, please back up your data for avoiding any data loss. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft

Knowledge Base:

http://support.microsoft.com/kb/322756/en-us

How to back up and restore the registry in Windows

Microsoft is not liable to any data loss or damage caused. Proceed at your own risk

Please let us know if the issue is resolved or you need any further assistance.