whenever I start my PC (upgraded to win 8.1) I reach the windows symbol. Then I come into a blue screen with an error message. Your PC needs to be repaired. Also it shows an error code: 0xc0000428. It says:
"Your pc needs to be repaired
The operating system couldnt be loaded because the digital signature of a file couldnt be vertifiedFile: windows\system32\drivers\sfsync02.sys Error code: 0xc0000428 You’ll need to use recovery tools on your installation media. if you dont have any installation media , contact your system administrator, or pc manufacture."
When I follow the instructions in other forums it doesn't worked. I already tried the automatically repair of my originally win 8 disk. But I get no other reactions of my PC...
I would be pleased if you can help me. Thank you