After update of my windows 10 I got problem Desktop is unavailable

My PC is working really normal before update. After I update my windows 10 the system show this message.

C:\WINDOWS\system32\config\systemprofile\Desktop is unavailable. If the location is on this PC, make sure the device or drive is connected or the disc is inserted, and then try again. If the location is on a network, make sure you're connected to the network or internet, and then try again. If the location still can't be found, it might have been moved or deleted. - OK

About to give up on the endless solutions offered I came across a 2015 Microsoft post that did the trick.

Once I had switched off my HP Stream 13 PC and then switched it back on with Windows 10 Home Edition v1803 miraculously the Desktop reappeared, and all seems to be fine again. Only caveat is that in the Security tab for Desktop folder permissions one creates I simply typed the word (no quotes) "Everyone" and then followed these instructions verbatim at

https://answers.microsoft.com/en-us/windows/forum/windows\_10-update/cwindowssystem32configsystemprofiledesktop-refers/1162bb53-62da-4c4b-a91c-e6e6ee42c382

I hope this works for others too as this disappearing Desktop is mighty frustrating immediately following today's Windows 10 Update.

You might could try re-downloading the Windows 10 installation media, most likely cause of hangs at a certain percentage is a few missing or corrupted files in the install media, in my experience. Also try to make sure you use a good working computer with at least 16GB of free disk space to make the install DVD or USB.

I've had loads of problems making the installation media and many corrupted ones over the last few years, and I think the media creation tool uses the host computers disk as scratch space when it creates the media, hence making sure there is enough free space. Unless I'm wrong on that scratch disk part... But still, trying again is worth it, I just fixed one yesterday that took 2 attempts with my procedure before it took.

I have an Acer laptop - AVG antivirus. I have exactly the same problem- black screen, recycle bin and bottom task bar displaying very little.

I have tried opening task manager and running the downloaded windows 10 programme from Microsoft. It gets to 30% on the duff machine and then back to a blank screen. I tried it both onto DVD and memory stick - same result

I have also tried nearly every other suggestion made in this string.

I have spoken to Acer who say that they can reset everything but I will loose all of my other programmes and files.

I feel really mad that Microsoft have caused this problem but do not seem to be offering a solution.

Anyone any further ideas before I do start from scratch?

We've seen this issue on at least 7 different machines here at our shop since May, 90% of the time, the following procedure will restore everything including your programs and files (and also install the latest build at the same time). Thought I'd share:

• Get a Windows 10 installation media (USB or DVD should both work), get the media creation tool here: https://www.microsoft.com/en-us/software-download/windows10

We're going to be doing a repair installation. While I mention this will keep your programs, files and settings, don't trust me, never trust anyone who says nothing bad can happen from toying with your OS. ALWAYS back up your stuff, back up your system as an image, do it often, do it regularly, and do it before you do this for sure. Stuff happens. 

• Boot to your sad, broken desktop with limited functionality so you see the error "C:\WINDOWS\system32\config\systemprofile\Desktop is unavailable." etc...
• Open a Run window = Windows Key > R
• Type "cmd.exe" and hit enter to run
• Insert your USB or DVD installation Media
• We need to determine which drive letter your installation media is since there is no explorer available, start by entering "dir d:" as d: is the first likely drive letter to be assigned, you'll look for an output that says "Volume in drive D is ESD-ISO", if you see that message you're almost home. (If dir d: does not return that message and a list of files, keep trying drive letter possibilities, dir e:, dir f:, etc., in order until you reach the one that is called ESD-ISO)
• Next, move to the proper directory by typing "X:" and hitting enter (Where X is the drive letter containing ESD-ISO you discovered in previous step)
• Then type "setup.exe" and hit enter
• The Windows upgrade program will then run. Since your network is likely non-functional, when it asks if you want to check for updates, decline, it will save you some time and a possible error message
• Make sure when it asks, you DO want to keep all programs and files
• Wait several hours (depending on your hardware)
• Wait some more
• It will likely hang for a long time at some percentage around 80, go ahead and wait
• If you're not done waiting yet, feel free to wait some more
• When it's done... Oh wait, it's not done yet, wait some more
• When it's done, HOPEFULLY you'll have your whole system back where it was with this nightmare of a botched upgrade installed.

We've not been able to nail down the cause in every case, but there is a pattern emerging in our experience, Avast antivirus software seems to be installed on a majority of the PC's with this problem. And an interruption in the upgrade process (power outage, system overheat, etc.) is a CERTAIN cause of this issue. 

We've also had a couple of machines where this process hasn't worked to restore the OS, I'm sorry if you're one of those people, but hope another kind soul will post here if they've had success where this failed.