Why does "core" empty window appear on my desktop from time to time?

Yes David I know what you mean it is a vast area that is a mystery to me too one needs to be a programmer to know what all that gear is see this https://support.microsoft.com/en-us/kb/928228

Now I was rather hoping the chkdsk with the /f and /r switches would correct any corruption and that is what it seems like to me. Try it if you haven't already and if there is still a problem or two then we might need to ask for help.

The other alternative is to save your data and then reinstall or you could try this Startup Repair I know it says start up repair for non booting machines but it might just fix whatever it missing on yours.

David just follow the tutorial -
https://www.sevenforums.com/tutorials/433-disk-check.html < if necessary include the /f and /r in the command line as per Option2 - I use the option 2 because I prefer that way.

Now when the command prompt after typing cmd is opened make sure you run it as admin (right click) .

Just don`t let this Adobe CC to run at startup, I`ll bet the windows never pops up again. :)

Your sfc comes up bad because you installed a bad update, this is my list of updates I do not install and my sfc is perfect.

Updates not to Install

KB2876229 SKYPE
KB2923545
KB2970228
KB2977728
KB2978092
KB2994023
KB3022345
KB3035583
KB2990214
KB3021917
KB2952664

There are many threads in updates and activation about it, read up over there :)

Start by removing KB3022345, then run sfc again.

AddRAM said:

Just don`t let this Adobe CC to run at startup, I`ll bet the windows never pops up again. :)

Your sfc comes up bad because you installed a bad update, this is my list of updates I do not install and my sfc is perfect.

Updates not to Install

KB2876229 SKYPE
KB2923545
KB2970228
KB2977728
KB2978092
KB2994023
KB3022345
KB3035583
KB2990214
KB3021917
KB2952664

There are many threads in updates and activation about it, read up over there :)

Start by removing KB3022345, then run sfc again.

for me too - good advice. Oh and look at what you are starting up in msconfig > Start up tab see pic (I keep mine all unticked)

Davidc2 said:

AddRAM said:

Just don`t let this Adobe CC to run at startup, I`ll bet the windows never pops up again. :)

The problem with stopping CC at start up is that Photoshop CC runs on a subscription and I think this is checked every month so stopping CC might break the validation process. But I am still not really sure what the "core" refers to. There is no "core" or "coresync" running at startup. Next time the core window appears I will try to track its origin down using regedit.

When you open Photoshop, it should call "home", so stopping it in start up shouldn't cause an issue. But this Adobe you are dealing with lol