SpyderTracks
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If you check the date and time are correct.Only problem I have is with the windows store if I try to download an app just says pending tried a few things seen a similar post on here withsome who had the same problem can't be bothered with a full reinstall of windows think I will do without it for now.
If they are, then open cmd as admin and type "wsreset"
That should reset the store, hopefully bring it back.
And of course, be sure you've applied all updates.