I wish when you have issues like this we could see hardware/driver builds mainly CPU/GPU(s), chipset driver and gpu driver version. I am assuming your build is different then mine and I have no issue with pinning and unpinning. Not even sure if the commands to wipe you taskbar would help or not from a previous taskbar issue with the edge icon not showing. That is what I would try...I can't remember which version had the issue and the solution was found. You will have to repin every thing you want there.
I had no issues before today either..I did two things, configure a couple of Hyper-V guests and run WU..that's it. Oh, and after my last boot hypervisor was no longer running either and I had to run a bcdedit command to fix that. Strange occurrences for me today.
Google is not playing nice for finding that fix which wipes the taskbar, maybe someone else can find it...I would try that and also make sure you feedback it. Apparently it is hardware specific. It specifically had to do with the upgrading and the edge icon appearing blank and doing nothing when you clicked on it. The fix wipes your taskbar. I just can't find it.
I don't know if you can be insider and upgrade normally, I would opt out of insider program, you may have got there latest KB test, I would uninstall it, sign out of Insider program on their home page at bottom, leave the program, and there's a place on 10240 you need to leave too, reboot
i'm windows insider and i use in my pc the last build 10240 and in my vmware i use my win 7 pro sp1 with geniunekey oem:coa and i have make reserve with same e-mail i'm insider what is the worst can happened ??
You get all these Insider KB's and builds with bugs to test to keep the rest of us safe, it's MANDITORY you download the new buggy builds
I have four machines and I use the same Email but each machine has it's own key. That key is absorded with the machine not the Email account.
i have no idea but i will take it and i see in 8 days from my side the one i have geniune OEM:COA Key and other i'm insider close 4 months ..i let microsoft choose for me