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Several users have reported that they have less issues after a clean install. I also believe a clean install will use less disk space. However, if the upgrade works for you without issues, then stick with it by all means.
Note that after the upgrade you must check that Win 10 is activated before you attempt a clean install. This will register your machine with Microsoft as "eligible for Win 10", so the clean install will be activated without the need for an activation code.
After the upgrade you will also notice a large folder named something like "Windows.old" on your systems drive. It contains all the files that you will need if you decide to roll back to 7 or 8. When you are sure you're not going back to 7 or 8, it is safe to delete that folder to free up as much as 20GB disk space. Of course this folder will not exist after a clean install.
I think the gremlins are starting already my icons in the tray network,speaker etc... are in black and white and this site using Firefox looks completely different - also I'm forced to logon to my pc using my Microsoft account which I don't want to do
We can’t stop here, this is bat country - Hunter S Thompson RIP
Strange, not the icons part which can be from a wrong graphics card driver or needing an update, but the logon... I've never needed that when I installed W10, which was smooth and worked perfectly, except for the main software I use at work... (a specific industrial thing).
I too disliked the option to log on with my MS account, but once I got used to it, it adds some nice functionality to the OS. For example: After I did my laptop, the desktop background picture suddenly matched the picture on my desktop machine. When you log on with your MS account, MS will upload some of your personal preferences and implement it for you on all your machines sharing that MS account. Some people may not like the fact that MS uploads their personal preferences, but I am not that paranoid about MS.
also I'm forced to logon to my pc using my Microsoft account which I don't want to do
Go to Settings, Accounts. You should see a "Sign in with a local account instead" option.
But as others have pointed out, logging in with a MS account will make a lot of settings available across your different machines/devices if you also use that account to login, which has its advantages.
I'm forced to logon to my pc using my Microsoft account
Someone wasn't paying attention during the update then! You were offered a choice! You can revert to the old account still but you'll then have to manually change the permissions on all your documents.
You are supposed to be able to activate the 10586 build with a Win 7 or 8 activation code, but I have never tried that, so I cannot confirm that it will work. If you do a clean install AFTER the free upgrade, you do not need the activation code and you get it for free. Just make sure the upgrade is activated, before doing the clean install. I've gone that route on several machines of family members and it worked every time. The clean install was free in every case.
I suspect it may have used your old display driver, and that driver is not playing well with 10. Before I give up, I would try to update the display driver. Do you know how to do that? With a clean install Win 10 should find and install the correct driver.
What a piece of crap. It does not reliably play videos in ANY format I've tried. With a single file, I've observed the following behaviors (with a program restart between each observation):
The video plays fine
The video plays with considerable artifacts
The video's first frame appears and I get audio
The video's first frame appears and I DON'T get audio
The audio plays but I get no video at all
In VLC and WMP, the video plays fine - every time.
".45 ACP - because shooting twice is just silly" - JSOP, 2010 - You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010 - When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013